Use Go 1.18 (#1610)

Signed-off-by: 1gtm <[email protected]>

.github/workflows/preview-website.yml

@@ -15,13 +15,13 @@ jobs:
       - name: Set up Go 1.x
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.17
+          go-version: ^1.18
         id: go
 
       - name: Use Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: '16'
 
       - name: Install yq
         run: |