fixed default branch

Author: chernser

.github/workflows/benchmarks.yml

@@ -40,8 +40,6 @@ jobs:
     steps:
       - name: Check out Git repository
         uses: actions/checkout@v4
-        with:
-          ref: ${{ env.CHC_BRANCH }}
       - name: Check out PR
         run: |
           git fetch --no-tags --prune --progress --no-recurse-submodules --depth=1 \