ci: bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/stage.yml

@@ -99,7 +99,7 @@ jobs:
 
       # Upload the snapshot artifacts
       - name: Upload Snapshot Artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: Snapshot-${{ github.run_number }}
           path: ${{ github.workspace }}/**/build/libs/*.jar
@@ -185,7 +185,7 @@ jobs:
             ${{ github.workspace }}/**/build/libs/*.jar
 
       - name: Upload Release Artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: Release
           path: ${{ github.workspace }}/**/build/libs/*.jar

.github/workflows/test.yml

@@ -84,7 +84,7 @@ jobs:
       # Archive test results for debugging if tests fail
       - name: Archive Test Results
         if: steps.run-tests.outputs.test_exit_code != '0'
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: test-results
           path: |