Update pylint.yml

.github/workflows/pylint.yml

diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index e6d72b4..47a3246 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -36,8 +36,8 @@
       - name: Fetch code formatting utils
         uses: actions/checkout@v4
         with:
-          repository: ${{ github.repository }}
-          ref: ${{ github.base_ref }}
+          repository: llvm/llvm-project
+          ref: refs/heads/main
           sparse-checkout: |
             llvm/utils/git/requirements_formatting.txt
             llvm/utils/git/code-format-helper.py