chore(deps): update actions/cache action to v2

[skip ci]

Author: renovate-bot

.github/workflows/nodejs.yml

@@ -10,7 +10,7 @@ jobs:
     - uses: actions/setup-node@v1
       with:
         node-version: "12.14.1"
-    - uses: actions/cache@v1
+    - uses: actions/cache@v2
       with:
         path: ~/.npm
         key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
@@ -34,7 +34,7 @@ jobs:
       - uses: actions/setup-node@v1
         with:
           node-version: "12.14.1"
-      - uses: actions/cache@v1
+      - uses: actions/cache@v2
         with:
           path: ~/.npm
           key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}