Use Go 1.25 (#315)

/cherry-pick

Signed-off-by: 1gtm <1gtm@appscode.com>

Author: 1gtm

.github/workflows/preview-website.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Set up Go 1.x
         uses: actions/setup-go@v5
         with:
-          go-version: '1.24'
+          go-version: '1.25'
         id: go
 
       - name: Use Node.js