ci: use ubuntu 22 for free arm runners

Author: marcoieni

src/ci/github-actions/jobs.yml

@@ -50,7 +50,7 @@ runners:
   - &job-aarch64-linux
     # Free some disk space to avoid running out of space during the build.
     free_disk: true
-    os: ubuntu-24.04-arm
+    os: ubuntu-22.04-arm
 
   - &job-aarch64-linux-8c
     os: ubuntu-22.04-arm64-8core-32gb