feat(github-action)!: Update image ghcr.io/allenporter/flux-local to v6 (#1600)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/flux-diff.yaml

@@ -35,7 +35,7 @@ jobs:
           path: default
 
       - name: Diff Resources
-        uses: docker://ghcr.io/allenporter/flux-local:v5.5.1
+        uses: docker://ghcr.io/allenporter/flux-local:v6.0.0
         with:
           args: >-
             diff ${{ matrix.resources }}