chore(deps): update renovatebot/github-action action to v43.0.4 (#1155)

Co-authored-by: grafanarenovatebot[bot] <146220760+grafanarenovatebot[bot]@users.noreply.github.com>

Author: grafanarenovatebot[bot]

.github/workflows/renovate.yml

@@ -76,7 +76,7 @@ jobs:
           private-key: ${{ env.GRAFANA_RENOVATE_PRIVATE_KEY }}
 
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@bdfd950c25796ebf1aa0c127ad55b69a14b04f69 # v43.0.3
+        uses: renovatebot/github-action@a4578d5584ac7a60d0f831537a481de7d00b9260 # v43.0.4
         with:
           configurationFile: .github/renovate-config.json5
           # renovate: datasource=docker depName=ghcr.io/renovatebot/renovate