ci(docspublish): upgrade go to 1.25.8 since vhs@0.11.0 requires it (#1895)

Author: Lee-W

.github/workflows/docspublish.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.25.1'
+          go-version: '1.25.8'
       - name: Set up VHS
         run: |
           sudo apt update