📝 docs(nodes.py): update SQLAgentNode description to reflect its new implementation

The description of the SQLAgentNode has been updated to reflect its new implementation, which now constructs a SQL agent from an LLM and tools instead of a Vector Store Router. This change was made to improve the accuracy of the description and to better reflect the functionality of the node.

src/backend/langflow/template/nodes.py

@@ -495,7 +495,7 @@ class SQLAgentNode(FrontendNode):
             ),
         ],
     )
-    description: str = """Construct an agent from a Vector Store Router."""
+    description: str = """Construct a sql agent from an LLM and tools."""
     base_classes: list[str] = ["AgentExecutor"]
 
     def to_dict(self):