Remove concurrent runs in pr.yaml

Author: xuzhao9

.github/workflows/linter.yaml

@@ -23,4 +23,4 @@ jobs:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}-${{ github.event_name == 'workflow_dispatch' }}
-  cancel-in-progress: true
+  cancel-in-progress: true

.github/workflows/pr.yaml

@@ -30,3 +30,7 @@ jobs:
       - name: Test Tritonbench operators
         run: |
           bash ./.ci/tritonbench/test-operators.sh
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}-${{ github.event_name == 'workflow_dispatch' }}
+  cancel-in-progress: true