ci: change docker image for ci

Signed-off-by: jiseong.oh <[email protected]>

Author: Jiseong-oh

.github/workflows/pull.yml

@@ -874,7 +874,7 @@ jobs:
       contents: read
     with:
       runner: linux.2xlarge
-      docker-image: ci-image:executorch-ubuntu-22.04-clang12
+      docker-image: ci-image:executorch-ubuntu-22.04-gcc11-aarch64
       submodules: 'recursive'
       ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
       timeout: 90