feat(cicd): updates GitHub actions node version to 14 (ng-select#2085)

1. Angular 14 does not support Node 12 or below. This commit updates Github actions node version to Node 14

Author: pavankjadda

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v1
         with:
-          node-version: '12.x'
+          node-version: '14.x'
 
       - name: Install dependencies
         run: yarn install

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v1
         with:
-          node-version: '12.x'
+          node-version: '14.x'
 
       - name: Install dependencies
         run: npm install