Fix Hugo version in postsubmit workflow to resolve build errors (#503)

Update Hugo version from 0.125.5 to 0.146.0 in postsubmit.yml to match
the minimum version requirement specified in hugo.yaml. This resolves
the build error where the 'try' function was not defined in the older
Hugo version.

Fixes the postsubmit GitHub action build failure.

Signed-off-by: xuezhaojun <zxue@redhat.com>

Author: xuezhaojun

.github/workflows/postsubmit.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup Hugo
         uses: peaceiris/actions-hugo@v3
         with:
-          hugo-version: '0.125.5'
+          hugo-version: '0.146.0'
           extended: true
       - name: Setup Node
         uses: actions/setup-node@v4