chore(deps): update ghcr.io/catthehacker/ubuntu:act-22.04 docker dige…

…st to 4c8f9e3 (#1261)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| ghcr.io/catthehacker/ubuntu | digest | `52a2937` -> `4c8f9e3` |

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charts/buildbarn/values.yaml

@@ -492,7 +492,7 @@ worker:
       # worker.runnerContainer.image.repository -- image repository (default is https://console.cloud.google.com/marketplace/product/google/rbe-ubuntu18-04)
       repository: ghcr.io/catthehacker/ubuntu
       # worker.runnerContainer.image.tag -- image tag
-      tag: act-22.04@sha256:52a293742bfc7db8497edbf7eacbb2077277f0010fac5b49cfadf23b35a1b86f
+      tag: act-22.04@sha256:4c8f9e3d45468457264549d266705bf39f46b470fd9d085b96c232696953cd87
     # worker.runnerContainer.securityContext -- specifies security settings for a container
     securityContext:
       runAsUser: 65534