docs: Regen CLI docs

docs/content/en/commands/hugo_gen.md

@@ -7,6 +7,10 @@ url: /commands/hugo_gen/
 
 A collection of several useful generators.
 
+```
+hugo gen [command] [flags]
+```
+
 ### Options
 
 ```
@@ -20,6 +24,7 @@ A collection of several useful generators.
       --config string              config file (default is hugo.yaml|json|toml)
       --configDir string           config dir (default "config")
       --debug                      debug output
+  -d, --destination string         filesystem path to write files to
   -e, --environment string         build environment
       --ignoreVendorPaths string   ignores any _vendor for module paths matching the given Glob pattern
       --log                        enable Logging