Update docs/source/contributing/style-guide.md

Co-authored-by: Steve Piercy <[email protected]>

docs/source/contributing/style-guide.md

@@ -19,7 +19,7 @@ Volto, and thus Plone 6, underwent a gradual evolution of its design system over
 
 ## Volto and Pastanaga UI
 
-Around 2017, Albert Albert Casado Celma introduced Pastanaga UI, which became Volto's default theme UI/UX.
+Around 2017, Albert Casado Celma introduced Pastanaga UI, which became Volto's default theme UI/UX.
 Despite being unfinished, it provided valuable resources and patterns gradually integrated into Volto.
 Albert has played a crucial role in refining Volto's UI/UX, offering valuable insights and guidance.
 As mentioned earlier, design systems evolve over time based on user feedback and changing needs.