chore(deps): bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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] <support@github.com>

Author: dependabot[bot]

.github/workflows/copilot-setup-steps.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup dotnet
         uses: actions/setup-dotnet@v5

.github/workflows/part-build.yml

@@ -13,7 +13,7 @@ jobs:
       COALESCE_VERSION: ${{inputs.COALESCE_VERSION}}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup dotnet
         uses: actions/setup-dotnet@v5
         with:
@@ -40,7 +40,7 @@ jobs:
         working-directory: playground/Coalesce.Web.Vue3
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-dotnet@v5
         with:
@@ -65,7 +65,7 @@ jobs:
       COALESCE_VERSION: ${{inputs.COALESCE_VERSION}}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       # setup-node and update npm are only here to preemptively test
       # the required install of npm@11 that's needed for OIDC npm publish
@@ -113,7 +113,7 @@ jobs:
       COALESCE_VERSION: ${{inputs.COALESCE_VERSION}}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - run: npm ci
         working-directory: ${{ github.workspace }}
@@ -144,7 +144,7 @@ jobs:
       COALESCE_VERSION: ${{inputs.COALESCE_VERSION}}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - run: npm ci
         working-directory: ${{ github.workspace }}
@@ -172,7 +172,7 @@ jobs:
         working-directory: docs
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # fetch all commits to get last updated time or other git log info
           fetch-depth: 0
@@ -217,7 +217,7 @@ jobs:
       COALESCE_VERSION: ${{ inputs.COALESCE_VERSION }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Setup dotnet
         uses: actions/setup-dotnet@v5

.github/workflows/part-compute-version.yml

@@ -20,7 +20,7 @@ jobs:
       COALESCE_VERSION: ${{ steps.version.outputs.COALESCE_VERSION }}
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: "Verify and set COALESCE_VERSION variable"
       id: version

.github/workflows/part-template-build.yml

@@ -21,7 +21,7 @@ jobs:
       COALESCE_VERSION: ${{inputs.COALESCE_VERSION}}
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Setup dotnet
       uses: actions/setup-dotnet@v5

.github/workflows/release.yml

@@ -58,7 +58,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Extract changelog for current version
         if: ${{ !inputs.prereleaseSlug }}