Add action concurrency (#3956)

.github/workflows/builder.yml

@@ -37,6 +37,10 @@ env:
   BUILD_NAME: supervisor
   BUILD_TYPE: supervisor
 
+concurrency:
+  group: '${{ github.workflow }}-${{ github.ref }}'
+  cancel-in-progress: true
+
 jobs:
   init:
     name: Initialize build

.github/workflows/ci.yaml

@@ -12,6 +12,10 @@ env:
   PRE_COMMIT_HOME: ~/.cache/pre-commit
   DEFAULT_CAS: v1.0.2
 
+concurrency:
+  group: '${{ github.workflow }}-${{ github.ref }}'
+  cancel-in-progress: true
+
 jobs:
   # Separate job to pre-populate the base dependency cache
   # This prevent upcoming jobs to do the same individually