chore(deps): Pin actions/cache action to (#24)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/actions/cache-pip/action.yml

@@ -22,7 +22,7 @@ runs:
   using: 'composite'
   steps:
     - name: Cache pip packages
-      uses: actions/cache@v4
+      uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
       with:
         path: |
           ${{ inputs.cache-paths }}