[docs] Fixed links

docs/features.md

@@ -20,8 +20,8 @@
 
 # Extra features
   - Import rules and tokens from other Lark grammars, for code reuse and modularity.
-  - Support for external regex module ([see here](/docs/classes.md#using-unicode-character-classes-with-regex))
-  - Import grammars from Nearley.js ([read more](/docs/nearley.md))
+  - Support for external regex module ([see here](classes.md#using-unicode-character-classes-with-regex))
+  - Import grammars from Nearley.js ([read more](nearley.md))
   - CYK parser
 
 ### Experimental features