Use Go 1.27, k8s 1.37 & debian:13 (#324)

/cherry-pick

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

Author: 1gtm

.github/workflows/preview-website.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Set up Go 1.x
         uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.6.0
         with:
-          go-version: '1.25'
+          go-version: '1.27'
         id: go
 
       - name: Use Node.js