Update publish-npm.yml to use NodeJS v20

This is the latest LTS version of Node, so that is what should be used to publish

Author: Lijah99

.github/workflows/publish-npm.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 20
       - run: npm install --package-lock=false
       - run: npm test
 
@@ -22,7 +22,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://registry.npmjs.org/
       - run: npm install --package-lock=false
       - run: npm publish