chore(deps): update actions/checkout action to v6 (#13032)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | major | `v5` → `v6` |

---

### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

### [`v6`](https://redirect.github.com/actions/checkout/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v5...v6)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "every weekend" in timezone
America/Los_Angeles, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/apollographql/apollo-client).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi4xNi4xIiwidXBkYXRlZEluVmVyIjoiNDIuOTIuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiOmNocmlzdG1hc190cmVlOiBkZXBlbmRlbmNpZXMiXX0=-->

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/api-extractor.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v6

.github/workflows/arethetypeswrong.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:

.github/workflows/change-prerelease-tag.yml

@@ -32,7 +32,7 @@ jobs:
       # Check out the repository, using the Github Actions Bot app's token so
       # that we can push later.
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           token: ${{ steps.github-actions-bot-app-token.outputs.token }}
           # Checkout release branch entered when workflow was kicked off

.github/workflows/cleanup-checks.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: add label
         uses: actions/github-script@v8.0.0
         with:
@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v6

.github/workflows/compare-build-output.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           # Fetch entire git history so we have the parent commit to compare against
           fetch-depth: 0

.github/workflows/docmodel.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v6

.github/workflows/exit-prerelease.yml

@@ -27,7 +27,7 @@ jobs:
       # Check out the repository, using the Github Actions Bot app's token so
       # that we can push later.
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           token: ${{ steps.github-actions-bot-app-token.outputs.token }}
           # Checkout release branch entered when workflow was kicked off

.github/workflows/knip.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Ubuntu/Node v20
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
       - name: Install dependencies (with cache)
         uses: bahmutov/npm-install@v1

.github/workflows/prerelease.yml

@@ -31,7 +31,7 @@ jobs:
       # Check out the repository, using the Github Actions Bot app's token so
       # that we can push later.
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           token: ${{ steps.github-actions-bot-app-token.outputs.token }}
           # Fetch entire git history so  Changesets can generate changelogs

.github/workflows/publish-pr-releases.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v6