ci: use bash shell for linux arm builds

Author: aminya

.github/workflows/CI.yml

@@ -184,6 +184,7 @@ jobs:
             mkdir -p "${PWD}/build"
           dockerRunArgs: |
             --volume "${PWD}/build:/build"
+          shell: /bin/bash
           env: |
             VCPKG_FORCE_SYSTEM_BINARIES: 1
           install: |