chore: update readme

Author: FWuermse

README.md

@@ -7,8 +7,9 @@ This library implements generalised rewriting based on the Coq approach and the
 - [x] Constraint generation
     - [x] generate the same constraints coq does
     - [x] compare algorithm and constraints of the coq and the paper version
-- [ ]
+- [ ] Proof search
     - [x] recreate eauto efficiently to handle multiple related goals
-    - [ ] support adding tactics and theorems dynamically
+    - [x] support adding theorems dynamically
+    - [ ] support adding tactics dynamically
 - [ ] solve real-world grw problems
     - [ ] idris port