fix: Sort imports in test_agent_knowledge.py using ruff

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/test_agent_knowledge.py

@@ -1,12 +1,13 @@
 from unittest.mock import MagicMock, patch
-import pytest
 
+import pytest
 from chromadb.api.types import EmbeddingFunction
 
 from crewai import Agent, Crew, Task
 from crewai.knowledge.source.string_knowledge_source import StringKnowledgeSource
 from crewai.process import Process
 
+
 class MockEmbeddingFunction(EmbeddingFunction):
     def __call__(self, texts):
         return [[0.0] * 1536 for _ in texts]