chore(deps): update grafana/shared-workflows/ action to

Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

.github/workflows/self-zizmor.yaml

@@ -45,7 +45,7 @@ jobs:
       - zizmor-check
     if: ${{ needs.zizmor-check.outputs.found-files == 'true' }}
 
-    uses: grafana/shared-workflows/.github/workflows/reusable-zizmor.yml@835ea6d866784d0db603612bfbb354d152b62f5c
+    uses: grafana/shared-workflows/.github/workflows/reusable-zizmor.yml@6469a5278fdedca811e1fc31528e2d4608c6debb
     with:
       runs-on: ${{ !github.event.repository.private && 'ubuntu-latest' || 'ubuntu-arm64-small' }}
       fail-severity: high