Update actions/setup-node action to v3 (#3220)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

.github/workflows/docs.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v3
         with:
           node-version: 12.x
       - uses: actions/cache@v2

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v3
         with:
           node-version: 12.x
       - uses: actions/cache@v2
@@ -39,7 +39,7 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 2
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v3
         with:
           node-version: 12.x
       - uses: actions/cache@v2
@@ -59,7 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v3
         with:
           node-version: 12.x
       - uses: actions/cache@v2