Update getting-started/CONCEPTS/ACTION-PLANNER.md

Co-authored-by: Corina <[email protected]>

getting-started/CONCEPTS/ACTION-PLANNER.md

@@ -14,7 +14,7 @@ or create an AutoGPT style agent (monologue).
 
 ### Validations 
 Validators are used to validate the response returned by the LLM and can guarantee
-that the parameters passed to an action mach a supplied schema. The validator used is automatically
+that the parameters passed to an action match a supplied schema. The validator used is automatically
 selected based on the augmentation being used. Validators also prevent hallucinated action names
 making it impossible for the LLM to trigger an action that doesn't exist.