Update nextpy/ai/agent/base_agent.py - fixed case

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: AumJavalgikar

nextpy/ai/agent/base_agent.py

@@ -32,7 +32,7 @@ class AgentState(Enum):
 
     IDLE = 0
     BUSY = 1
-    USED_AS_skill = 2
+    USED_AS_SKILL = 2
     ERROR = 3