fix: gh action

Author: carsakiller

.github/workflows/pull_request.yml

@@ -23,7 +23,6 @@ jobs:
       - name: Detect Added Submodules
         run: |
           BASE_REF=${{github.event.pull_request.base.sha}}
-          git checkout $BASE_REF
           ADDED_SUBMODULES=$(git diff --submodule ${BASE_REF}..HEAD | grep '^Submodule' | awk '{ print $2 }')
           echo "Added submodules: $ADDED_SUBMODULES"
           echo "ADDED_SUBMODULES=$ADDED_SUBMODULES" >> $GITHUB_ENV
@@ -59,7 +58,6 @@ jobs:
       - name: Detect Added Submodules
         run: |
           BASE_REF=${{github.event.pull_request.base.sha}}
-          git checkout $BASE_REF
           ADDED_SUBMODULES=$(git diff --submodule ${BASE_REF}..HEAD | grep '^Submodule' | awk '{ print $2 }')
           echo "Added submodules: $ADDED_SUBMODULES"
           echo "ADDED_SUBMODULES=$ADDED_SUBMODULES" >> $GITHUB_ENV