actions cache update

Author: GLiberman

.github/workflows/deploy.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/setup-python@v2
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('buildtools/requirements.txt') }}