fix aarch64 CI run

Author: abhishek-iitmadras

.github/workflows/linux.yml

@@ -171,9 +171,7 @@ jobs:
     if: github.repository == 'numpy/numpy'
     runs-on: ubuntu-22.04-arm
     steps:
-    - name: Checkout for PR
-      if: github.event_name == 'pull_request'
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         submodules: recursive
         fetch-tags: true