Updated node-version to 20 in main.yml

Author: D-K-P

.github/workflows/main.yml

@@ -26,10 +26,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@3
+      - uses: actions/setup-node@v3
         with:
-          node-version: "16.x"
+          node-version: "20"
           registry-url: "https://registry.npmjs.org"
       - run: npm ci
       - run: npm test