Bump actions/upload-artifact from 4.6.2 to 6.0.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4.6.2 to 6.0.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@ea165f8...b7c566a)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/default.yml

@@ -39,7 +39,7 @@ jobs:
     - name: Build and test project
       run: mvn clean verify
     - name: Upload Maven build artifact
-      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 #v4.6.2
+      uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f #v6.0.0
       with:
         name: SmoothTimber-Artifact
         path: target/smoothtimber-*.jar