chore: update Node.js version to 20 in CI workflows

Author: abbesBenayache

.github/workflows/dapp-deploy.yml

@@ -91,7 +91,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18.15.0'
+          node-version: '20'
           cache: 'npm'
 
       - name: Install dependencies

.github/workflows/dapp-release.yml

@@ -75,7 +75,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18.15.0'
+          node-version: '20'
           cache: 'npm'
 
       - name: Install dependencies