Use setup-node@v4 instead of pinning to a revision

Author: deejay1

.github/workflows/check-dist.yml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set Node.js 20.x
-        uses: actions/setup-node@v4.0.1
+        uses: actions/setup-node@v4
         with:
           node-version: 20.x
           cache: npm

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set Node.js 20.x
-      uses: actions/setup-node@v4.0.1
+      uses: actions/setup-node@v4
       with:
         node-version: 20.x
         cache: npm