chore: bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup Deno
         uses: denoland/setup-deno@v2

.github/workflows/post_publish.yml

@@ -11,7 +11,7 @@ jobs:
     if: github.repository == 'denoland/fresh'
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Upload version file to dl.deno.land
         env:

.github/workflows/publish.yml

@@ -16,7 +16,7 @@ jobs:
     if: github.repository_owner == 'denoland'
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Deno
         uses: denoland/setup-deno@v2