chore: Update actions/setup-node to v4

- Bump node version to 20.x (https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default)
- Read node version directly from `.nvmrc` file using the `node-version-file` command (https://github.com/actions/setup-node/blob/main/docs/advanced-usage.md#node-version-file)

Author: abhiram6121

.github/workflows/main.yml

@@ -12,14 +12,10 @@ jobs:
       - name: Checkout commit
         uses: actions/checkout@v4
 
-      - name: Read .nvmrc
-        run: echo "NVMRC=$(cat .nvmrc)" >> $GITHUB_OUTPUT
-        id: nvm
-
       - name: Setup node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: "${{ steps.nvm.outputs.NVMRC }}"
+          node-version-file: '.nvmrc'
           cache: yarn
 
       - name: Install dependencies

.nvmrc

@@ -1 +1 @@
-16.15.1
+20.x