chore: bump min hugo version

To v0.81 to get Hugo bug fixes and enable multiline Hugo tpl refactoring, see https://github.com/gohugoio/hugo/releases/tag/v0.81.0

wowchemy/config.yaml

@@ -20,7 +20,7 @@ outputFormats:
     notAlternative: true
 module:
   hugoVersion:
-    min: '0.78.2'
+    min: '0.81.0'
     extended: true
   mounts:
     - source: content