docs: Regen CLI docs

docs/content/en/commands/hugo.md

@@ -51,6 +51,7 @@ hugo [flags]
       --noChmod                    don't sync permission mode of files
       --noTimes                    don't sync modification time of files
       --path-warnings              print warnings on duplicate target paths etc.
+      --poll                       use a poll based approach to watch for file system changes
       --print-mem                  print memory usage to screen at intervals
       --quiet                      build in quiet mode
       --renderToMemory             render to memory (only useful for benchmark testing)