Fix Node.js version compatibility in GitHub Actions workflows

Co-authored-by: 0xrinegade <[email protected]>

Author: Copilot

.github/workflows/comprehensive-e2e-tests.yml

@@ -41,7 +41,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20.18.0'
           cache: 'yarn'
 
       - name: Install dependencies
@@ -128,7 +128,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20.18.0'
           cache: 'yarn'
 
       - name: Install dependencies
@@ -189,7 +189,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20.18.0'
           cache: 'yarn'
 
       - name: Install dependencies
@@ -230,7 +230,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20.18.0'
           cache: 'yarn'
 
       - name: Install dependencies

.github/workflows/netlify-deploy.yml

@@ -113,7 +113,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20.18.0'
 
       - name: Install Lighthouse CI
         run: npm install -g @lhci/cli