Update index.d.ts for react-redux (#20848)

* Update index.d.ts for react-redux

known issue described in comments

* minor

* update

types/react-redux/index.d.ts

@@ -7,9 +7,17 @@
 //                 Frank Tan <https://github.com/tansongyang>
 //                 Nicholas Boll <https://github.com/nicholasboll>
 //                 Dibyo Majumdar <https://github.com/mdibyo>
+//                 Prashant Deva <https://github.com/pdeva>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.4
-
+    
+// Known Issue:
+// There is a known issue in TypeScript, which doesn't allow decorators to change the signature of the classes 
+// they are decorating. Due to this, if you are using @connect() decorator in your code,
+// you will see a bunch of errors from TypeScript. The current workaround is to use connect() as a function call on
+// a separate line instead of as a decorator. Discussed in this github issue:
+// https://github.com/DefinitelyTyped/DefinitelyTyped/issues/20796
+    
 import * as React from 'react';
 import * as Redux from 'redux';