Infrastructure: Update actions/setup-node requirement to v2.1.2 (pull #1555)

Updates the requirements on [actions/setup-node](https://github.com/actions/setup-node) to permit the latest version.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/commits/c6fd00ceb9747fb23ffdf72987450a2664414867)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/lint-css.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2.1.2
 
       - uses: xt0rted/stylelint-problem-matcher@v1
 

.github/workflows/lint-js.yml

@@ -29,7 +29,7 @@ jobs:
       # setup-node task is used without a particular version in order to load
       # the ESLint problem matchers
       - name: Set up Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2.1.2
 
       - name: Install npm dependencies
         run: npm ci

.github/workflows/regression.yml

@@ -33,7 +33,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2.1.2
 
       - name: Install npm dependencies
         run: npm ci

.github/workflows/spelling.yml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up Node.js
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
 
       - name: Install npm dependencies
         run: npm ci