Lower checkout version (#3)

Author: nathro

action.yml

@@ -26,7 +26,7 @@ runs:
   using: "composite"
   steps:
     - name: Checkout PR Head
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
       with:
         token: ${{ inputs.github_token }}
         ref: refs/pull/${{ inputs.pull_number }}/head