fix(github-action): update mshick/add-pr-comment action to v2.8.2

Author: renovate[bot]

.github/workflows/flux-tests.yaml

@@ -36,7 +36,7 @@ jobs:
 
       - if: ${{ steps.diff.outputs.diff != '' }}
         name: Add comment
-        uses: mshick/add-pr-comment@7c0890544fb33b0bdd2e59467fbacb62e028a096 # v2.8.1
+        uses: mshick/add-pr-comment@b8f338c590a895d50bcbfa6c5859251edc8952fc # v2.8.2
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
           message-id: "${{ github.event.pull_request.number }}/${{ matrix.path }}/${{ matrix.resource }}"