chore(deps): update actions/checkout action to v6 (#1548)

Co-authored-by: jenkins-dependency-updater[bot] <81680575+jenkins-dependency-updater[bot]@users.noreply.github.com>

Author: jenkins-dependency-updater[bot]

.github/workflows/lint-test.yaml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/linter.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Lint Code Base
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install and run helm-docs
         run: |-
           # renovate: datasource=github-releases depName=norwoodj/helm-docs

.github/workflows/release.yaml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/renovate.yaml

@@ -27,7 +27,7 @@ jobs:
           private_key: ${{ secrets.JENKINS_DEPENDENCY_UPDATER_PRIVATE_KEY }}
 
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Self-hosted Renovate
         uses: renovatebot/github-action@v44.0.2

.github/workflows/sync-readme.yaml

@@ -12,10 +12,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: |
           cp -f README.md ${{ runner.temp }}/README.md
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: gh-pages
       - run: |