Update mheap/github-action-required-labels action to v5.6.0 (#27037)

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

.github/workflows/require-changelog-label.yml

@@ -12,7 +12,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: mheap/github-action-required-labels@0ac283b4e65c1fb28ce6079dea5546ceca98ccbe # v5.5.2
+      - uses: mheap/github-action-required-labels@23e10fde7e062233401931a0eece796cd9bf3177 # v5.6.0
         with:
           mode: minimum
           count: 1