chore(deps): update ghcr.io/renovatebot/renovate docker tag to v39.91.4

| datasource | package                      | from    | to      |
| ---------- | ---------------------------- | ------- | ------- |
| docker     | ghcr.io/renovatebot/renovate | 39.91.3 | 39.91.4 |

Author: renovate[bot]

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     container: 
-      image: ghcr.io/renovatebot/renovate:39.91.3
+      image: ghcr.io/renovatebot/renovate:39.91.4
       # github hosted runners are running as `1001:127` (ubuntu:docker)
       options: -u 1001:0 --group-add 1001 --group-add 12021 --group-add 127