Update README.md

Author: jwtowner

README.md

@@ -67,8 +67,8 @@ Syntax Reference
 | Negative Lookahead | `!e` | Matches without consuming input if expression *e* fails to match the input |
 | Cut Before | `--e` | Issues a cut instruction before the expression *e* |
 | Cut After | `e--` | Issues a cut instruction after the expression *e* |
-| Action Scheduling | `e < a` | Schedules a semantic action *a* to be evaluated if expression *e* successfully matches the input |
-| Attribute Binding | `v % e` | Binds the return value of the last evaluated semantic action within the expression *e* to the attribute *v* |
+| Action | `e < a` | Schedules a semantic action *a* to be evaluated if expression *e* successfully matches the input |
+| Attribute | `v % e` | Binds the return value of the last evaluated semantic action within the expression *e* to the attribute *v* |
 
 | Control | Description |
 | --- | --- |