doc: Fixed a small typo in the warning message

This PR fixes a small type in the warning message

Author: dfeddad

scrapegraphai/graphs/base_graph.py

@@ -55,7 +55,7 @@ def __init__(self, nodes: list, edges: list, entry_point: str, use_burr: bool =
         if nodes[0].node_name != entry_point.node_name:
             # raise a warning if the entry point is not the first node in the list
             warnings.warn(
-                "Careful! The entry point node is different from the first node if the graph.")
+                "Careful! The entry point node is different from the first node in the graph.")
 
         # Burr configuration
         self.use_burr = use_burr