Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Node.js environment
-        uses: actions/setup-node@v4.4.0
+        uses: actions/setup-node@v6.3.0
         with:
           node-version-file: '.nvmrc'
 
@@ -85,7 +85,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Node.js environment
-        uses: actions/setup-node@v4.4.0
+        uses: actions/setup-node@v6.3.0
         with:
           node-version-file: '.nvmrc'