fix: Sort imports in test_agent_knowledge.py according to standard order

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

tests/test_agent_knowledge.py

@@ -1,9 +1,10 @@
+import pytest
+from unittest.mock import MagicMock, patch
+
 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
-import pytest
-from unittest.mock import MagicMock, patch
 
 class MockEmbeddingFunction(EmbeddingFunction):
     def __call__(self, texts):