ci(deps): bump actions/upload-artifact from 6 to 7 (#538)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/nightly-cassandra-build.yml

@@ -80,7 +80,7 @@ jobs:
           echo "artifact_size=$FILE_SIZE" >> $GITHUB_OUTPUT
 
       - name: Upload artifact to workflow
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: cassandra-${{ matrix.version }}
           path: ${{ steps.artifact.outputs.artifact_path }}

.github/workflows/pr-checks.yml

@@ -37,7 +37,7 @@ jobs:
 
       - name: Upload test results
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: test-results
           path: |
@@ -66,7 +66,7 @@ jobs:
 
       - name: Upload coverage reports
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: coverage-reports
           path: |
@@ -101,7 +101,7 @@ jobs:
 
       - name: Upload detekt reports
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: detekt-reports
           path: |