chore(deps): update github pipeline dependencies to v6

Author: github-actions[bot]

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: [idp]
     environment: ci
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -42,7 +42,7 @@ jobs:
           NUGET_SOURCE: ${{ vars.GSOFTDEV_NUGET_SOURCE }}
 
       - name: Upload NuGet package
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()
         with:
           name: nuget-package

.github/workflows/publish.yml

@@ -19,7 +19,7 @@ jobs:
     environment: ci
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0