Auto merge of rust-lang#133902 - Kobzol:ci-dist-arm-runner, r=<try>

CI: move `dist-arm-linux` to a free runner

Related issue: rust-lang/infra-team#181

First, I want to test whether we could actually move this to a free runner, vs moving to the 8-core ARM runner.

r? `@MarcoIeni`

try-job: dist-arm-linux

Author: bors

src/ci/github-actions/jobs.yml

@@ -143,7 +143,7 @@ auto:
     <<: *job-linux-4c
 
   - image: dist-arm-linux
-    <<: *job-linux-8c
+    <<: *job-linux-4c
 
   - image: dist-armhf-linux
     <<: *job-linux-4c