add: doc_out_path flag

Author: carsakiller

src/content/wiki/usage.mdx

@@ -67,6 +67,14 @@ Generate [documentation](/wiki/export-docs) from a workspace. The files will be
 
 Example: `--doc=C:/Users/Me/Documents/myLuaProject/`
 
+### --doc_out_path
+
+**Type:** `string`
+
+The path to output generated documentation at. See [`--doc` for more info](#-doc).
+
+Example: `--doc=C:/Users/Me/Documents/myLuaProjectDocumentation`
+
 ### --logpath
 
 **Type:** `string`