workflows: downgrade hugo to prior release

Hugo 0.141.0 introduced a new `try` function, replacing the way error
handling is done. Downgrade until we can land a fix in upstream, see
thuliteio/doks-core#115.

Signed-off-by: Luca Zeuch <[email protected]>

Author: l-zeuch

.github/workflows/hugo.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install Hugo
         uses: peaceiris/actions-hugo@v3
         with:
-          hugo-version: 'latest'
+          hugo-version: '0.140.2'
           # We use the extended version just to be on the safe side.
           # It is recommended anyway.
           extended: true