Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  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/build.yml

@@ -88,7 +88,7 @@ jobs:
 
       # Store already-built plugin as an artifact for downloading
       - name: Upload artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: ${{ steps.artifact.outputs.filename }}
           path: ./build/distributions/content/*/*
@@ -124,7 +124,7 @@ jobs:
       # Collect Tests Result of failed tests
       - name: Collect Tests Result
         if: ${{ failure() }}
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: tests-result
           path: ${{ github.workspace }}/build/reports/tests
@@ -215,7 +215,7 @@ jobs:
       # Collect Plugin Verifier Result
       - name: Collect Plugin Verifier Result
         if: ${{ always() }}
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: pluginVerifier-result
           path: ${{ github.workspace }}/build/reports/pluginVerifier