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] <support@github.com>

Author: dependabot[bot]

.github/workflows/quality.yml

@@ -1,34 +1,34 @@
-name: Code Quality Gate
-
-on:
-  pull_request:
-  push:
-    branches: [ main ]
-
-jobs:
-  quality:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Normalize line endings
-        run: git add --renormalize . && git checkout -- .
-
-      - name: Setup .NET
-        uses: actions/setup-dotnet@v4
-        with:
-          global-json-file: global.json
-
-      - name: Restore
-        run: dotnet restore
-
-      - name: Check formatting
-        run: dotnet format PragmaticDotNetCodeRules.sln --verify-no-changes --no-restore
-
-      - name: Build
-        run: dotnet build --no-restore --configuration Release
-
-      - name: Test
-        run: dotnet test --no-build --configuration Release
+name: Code Quality Gate
+
+on:
+  pull_request:
+  push:
+    branches: [ main ]
+
+jobs:
+  quality:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Normalize line endings
+        run: git add --renormalize . && git checkout -- .
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          global-json-file: global.json
+
+      - name: Restore
+        run: dotnet restore
+
+      - name: Check formatting
+        run: dotnet format PragmaticDotNetCodeRules.sln --verify-no-changes --no-restore
+
+      - name: Build
+        run: dotnet build --no-restore --configuration Release
+
+      - name: Test
+        run: dotnet test --no-build --configuration Release