Use fixed version of setup node action

Author: flaksp

.github/workflows/build.yml

@@ -21,7 +21,7 @@ jobs:
             ${{ runner.os }}-npm-
 
       - name: Setup Node.js
-        uses: actions/setup-node@master
+        uses: actions/setup-node@v2.4.0
         with:
           node-version: '14.x'
 

.github/workflows/code-quality.yml

@@ -21,7 +21,7 @@ jobs:
             ${{ runner.os }}-npm-
 
       - name: Setup Node.js
-        uses: actions/setup-node@master
+        uses: actions/setup-node@v2.4.0
         with:
           node-version: '14.x'
 
@@ -49,7 +49,7 @@ jobs:
             ${{ runner.os }}-npm-
 
       - name: Setup Node.js
-        uses: actions/setup-node@master
+        uses: actions/setup-node@v2.4.0
         with:
           node-version: '14.x'
 

.github/workflows/release.yml

@@ -24,7 +24,7 @@ jobs:
             ${{ runner.os }}-npm-
 
       - name: Setup Node.js
-        uses: actions/setup-node@master
+        uses: actions/setup-node@v2.4.0
         with:
           node-version: '14.x'