ci: Retry lint image building once after failure

The same was done for the other CI tasks in commit fa6aa9f. This may
guard against intermittent network issues to download the base image or
packages ...

Author: MarcoFalke

.github/workflows/ci.yml

@@ -621,7 +621,10 @@ jobs:
               "."
           ]
 
-          run(build_cmd)
+          if run(build_cmd, check=False).returncode != 0:
+              print(f"Retry building image tag after failure")
+              time.sleep(3)
+              run(cmd_build)
 
           CIRRUS_PR_FLAG = []
           if '${{ github.event_name }}' == "pull_request":