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

…st to 7692829 (#867)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| ghcr.io/catthehacker/ubuntu | digest | `6a60bcb` -> `7692829` |

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/PingCAP-QE/ee-ops).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy45My4xIiwidXBkYXRlZEluVmVyIjoiMzcuOTMuMSIsInRhcmdldEJyYW5jaCI6Im1haW4ifQ==-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

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@sha256:6a60bcb2496c221a67a6cce88242c6bd06d4e616b6fe7887168458fc3a3553ef
+      tag: act-22.04@sha256:76928290c5b360f1b5b091e7728e792aa2f801f8370510c53a191df60be82dc1
     # worker.runnerContainer.securityContext -- specifies security settings for a container
     securityContext:
       runAsUser: 65534