Readme: whitelist what forbidNotNormalizedType supports (#233)

Author: janedbal

README.md

@@ -600,11 +600,18 @@ function example($unknown) {
 ```
 
 ### forbidNotNormalizedType
-- Reports any PhpDoc or native type that is not normalized, which can be:
+- Reports PhpDoc or native type that is not normalized, which can be:
   - when child and parent appears in its union or intersection
   - when same type appears multiple times in its union or intersection
   - when DNF is not used
     - configurable by `checkDisjunctiveNormalForm`
+  - supports:
+    - parameter typehints & `@param` phpdoc
+    - return typehint & `@return` phpdoc
+    - property typehint & `@var` phpdoc
+    - inline `@var` phpdoc
+    - `@throws` phpdoc
+    - multi-catch statements
 - Main motivation here is that PHPStan normalizes all types before analysis, so it is better to see it in codebase the same way PHPStan does
 
 ```php