Update README.md

Author: winscripter

README.md

@@ -10,7 +10,7 @@ ILSourceParser aims to be the comprehensive parser for Microsoft Intermediate La
  - Asynchronous parsing
  - Parsing the following types:
    - Method parameters:
-     - \out], \opt] and \in] prefixes
+     - [out], [opt] and [in] prefixes
      - Marshalling (IL `marshal()` function)
      - Optional parameter names
    - Method Locals: