updating gh 'actions/cache' away from deprecated v2

Author: melange396

.github/workflows/ci.yaml

@@ -103,7 +103,7 @@ jobs:
         with:
           node-version: '16.x'
       - name: Cache Node.js modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.npm # npm cache files are stored in `~/.npm` on Linux/macOS
           key: ${{ runner.OS }}-node2-${{ hashFiles('**/package-lock.json') }}

.github/workflows/release-helper.yml

@@ -121,7 +121,7 @@ jobs:
         with:
           node-version: "16.x"
       - name: Cache Node.js modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.npm # npm cache files are stored in `~/.npm` on Linux/macOS
           key: ${{ runner.OS }}-node2-${{ hashFiles('**/package-lock.json') }}

.github/workflows/update_gdocs_data.yml

@@ -14,7 +14,7 @@ jobs:
         uses: actions/setup-python@v2
         with:
           python-version: 3.8
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pipd-${{ hashFiles('requirements.dev.txt') }}