build: Update node to v20

Author: AaronDewes

.github/workflows/build.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
-          node-version: "18"
+          node-version: "20"
 
       - name: Setup Pages
         uses: actions/configure-pages@v5

.github/workflows/sync.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Install Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20'
           cache: 'yarn'
 
       - name: Install dependencies & sync data