fix typo

Author: PhilippSalvisberg

README.md

@@ -2,7 +2,7 @@
 
 ## Introduction
 
-Trivadis published their guidelines for PL/SQL & SQL in 2009 in the context of the DOAG conference in Nuremberg. Since then these guidelines have been continuously extended and improved. Now they are managed as a set of markdown files. This makes the the guidelines more adaptable for individual application needs and simplifies the continous improvement.
+Trivadis published their guidelines for PL/SQL & SQL in 2009 in the context of the DOAG conference in Nuremberg. Since then these guidelines have been continuously extended and improved. Now they are managed as a set of markdown files. This makes the guidelines more adaptable for individual application needs and simplifies the continous improvement.
 
 ## HTML format