[MINOR] Only build docs for most recent commit

Author: Mark2000

.github/workflows/documentation.yml

@@ -12,6 +12,10 @@ permissions:
     id-token: write
 
 
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-latest