CI: setup-dependent pip cache (#16751)

* Setup-dependent pip cache

* Do not restore from old versions

.github/workflows/update_metdata.yml

@@ -15,16 +15,13 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      
+
       - name: Loading cache.
         uses: actions/cache@v2
         id: cache
         with:
           path: ~/.cache/pip
-          key: v1-metadata
-          restore-keys: |
-            v1-metadata-${{ hashFiles('setup.py') }}
-            v1-metadata
+          key: v1-metadata-${{ hashFiles('setup.py') }}
 
       - name: Setup environment
         run: |
@@ -33,4 +30,3 @@ jobs:
       - name: Update metadata
         run: |
           python utils/update_metadata.py --token ${{ secrets.SYLVAIN_HF_TOKEN }} --commit_sha ${{ github.sha }}
-