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/java-build.yml

@@ -56,7 +56,7 @@ jobs:
         run: ./mvnw -B -Pbug-check -Pcompile-jdk${{ matrix.java-versions }} test --file pom.xml
 
       # Uploads test artifacts for each JDK version
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         if: always()
         with:
           name: test_output_sk_jdk${{ matrix.java-versions }}u

.github/workflows/java-publish-package.yml

@@ -30,7 +30,7 @@ jobs:
         run: ./mvnw -B -DskipTests -Pcompile-jdk8 -P-compile-jdk17 clean deploy --file pom.xml -DaltDeploymentRepository=local::file:///tmp/target/staging-deploy
 
       - name: Upload Artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: Artifacts
           path: /tmp/target/staging-deploy