build(github-actions): Bump fsfe/reuse-action action to v6

Author: renovate[bot]

.github/workflows/reuse-compliance.yml

@@ -16,4 +16,4 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Execute REUSE Compliance Check
-      uses: fsfe/reuse-action@v5
+      uses: fsfe/reuse-action@v6