Merge pull request #1048 from dolthub/zachmu/ci

[no-release-notes] Added concurrency control for CI

Author: zachmu

.github/workflows/format.yml

@@ -4,6 +4,10 @@ on:
   pull_request:
     branches: [ main ]
 
+concurrency:
+  group: format-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   format:
     name: Format PR

.github/workflows/test.yml

@@ -1,5 +1,10 @@
 name: Test
 on: [pull_request]
+
+concurrency:
+  group: test-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     strategy: