Bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/docs.yml

@@ -33,7 +33,7 @@ jobs:
           private-key: ${{ secrets.BOT_PRIVATE_KEY }}
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           token: ${{ steps.bot.outputs.token }}
 

.github/workflows/release-action.yml

@@ -65,7 +65,7 @@ jobs:
           git config --global user.email "$USER_EMAIL"
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: "refs/heads/${{ inputs.branch }}"
           token: ${{ steps.bot.outputs.token }}

.github/workflows/release-check.yml

@@ -28,7 +28,7 @@ jobs:
         run: echo "$GITHUB_CONTEXT"
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           # Required to deduce version from git tags
           fetch-depth: 0

.github/workflows/release.yml

@@ -110,7 +110,7 @@ jobs:
           git config --global user.email "$USER_EMAIL"
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: "refs/heads/${{ inputs.branch }}"
           token: ${{ steps.bot.outputs.token }}

.github/workflows/version-check.yml

@@ -58,7 +58,7 @@ jobs:
         run: echo "$GITHUB_CONTEXT"
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         if: steps.skipper.outputs.skip != 'true'
         with:
           token: ${{ secrets.GITHUB_TOKEN }}