fix a typo

Author: mr-c

include/docs/cursor.h

@@ -38,7 +38,7 @@ PyDoc_STRVAR(
 
 PyDoc_STRVAR(
   cursor_metadata__doc__,
-  "Similiar to description property, this property returns a dictionary with complete metadata.\n\n"
+  "Similar to description property, this property returns a dictionary with complete metadata.\n\n"
   "The dictionary contains the following keys:\n\n"
   "- catalog:     catalog (always 'def')\n"
   "- schema:      current schema\n"