Revert "Continue even if clang failure"

This reverts commit d78f807.

Author: tyeth

.github/workflows/release-offline.yml

@@ -37,7 +37,6 @@ jobs:
       - name: pre-install
         run: bash ci/actions_install.sh
       - name: clang
-        continue-on-error: true
         run: python3 ci/run-clang-format.py -r -e "ci/*" -e "bin/*" -e src/nanopb -e src/protos -e src/pb.h -e src/provisioning/tinyusb src/
 
   test-offline-mode: