Update ci workflow to Install NVM and Node

Author: AnupamaSarjoshi

.github/workflows/ci.yml

@@ -60,6 +60,14 @@ jobs:
           ini-values: max_input_vars=5000
           coverage: none
 
+      - name: Install NVM and Node
+        run: |
+          curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.0/install.sh | bash
+          export NVM_DIR="$HOME/.nvm"
+          [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+          nvm install 20
+          nvm use 20
+
       - name: Initialise moodle-plugin-ci
         run: |
           composer create-project -n --no-dev --prefer-dist moodlehq/moodle-plugin-ci ci ^4