Fix Black linter formatting - remove trailing whitespace

Co-authored-by: nomeguy <85475922+nomeguy@users.noreply.github.com>

sqlalchemy_adapter/adapter.py

diff --git a/sqlalchemy_adapter/adapter.py b/sqlalchemy_adapter/adapter.py
index b7c7945..055c010 100644
--- a/sqlalchemy_adapter/adapter.py
+++ b/sqlalchemy_adapter/adapter.py
@@ -40,7 +40,7 @@
     # Create a unique class name based on the table name to avoid SQLAlchemy warnings
     # Convert table_name to a valid Python class name
     class_name = "CasbinRule_" + "".join(c if c.isalnum() else "_" for c in table_name)
-    
+
     # Dynamically create the class with a unique name
     CasbinRule = type(
         class_name,