Documentation: Heading style fixed.

plugins/org.yakindu.sct.doc.user/src/user-guide/c-domain.textile

@@ -5,7 +5,7 @@ p.
 
 p(edit-on-github). "Edit on GitHub":https://github.com/Yakindu/statecharts/edit/master/plugins/org.yakindu.sct.doc.user/src/user-guide/c-domain.textile
 
-h1(#cdom_deep-c-integration). Deep C Integration: Integrating your C source code with your state machines
+h1(#cdom_deep-c-integration). Deep C integration: Integrating your C source code with your state machines
 
 h2(#cdom_introduction). Introduction