ci: bump ubuntu from 186072b to 84e77de in /docker (#148)

Bumps ubuntu from `186072b` to `84e77de`.

---
updated-dependencies:
- dependency-name: ubuntu
  dependency-version: '24.04'
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Lev <lev@leontiev.me>

Author: dependabot[bot]

docker/Dockerfile.test

@@ -1,4 +1,4 @@
-FROM ubuntu:24.04@sha256:186072bba1b2f436cbb91ef2567abca677337cfc786c86e107d25b7072feef0c
+FROM ubuntu:24.04@sha256:84e77dee7d1bc93fb029a45e3c6cb9d8aa4831ccfcc7103d36e876938d28895b
 
 
 ENV DEBIAN_FRONTEND=noninteractive