vcs: s/VCS/Vcs/

According to style guide.

Change-Id: I05c1d4f50ddbf2876ab7e0835f4abec95fd573b2
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@nokia.com>

src/plugins/vcsbase/diffhighlighter.h

@@ -45,7 +45,7 @@ QT_END_NAMESPACE
 namespace Core { class ICore; }
 namespace TextEditor { class FontSettingsPage; }
 
-namespace VCSBase {
+namespace VcsBase {
 
 namespace Internal { class DiffHighlighterPrivate; }
 
@@ -69,6 +69,6 @@ private:
     Internal::DiffHighlighterPrivate *const d;
 };
 
-} // namespace VCSBase
+} // namespace VcsBase
 
 #endif // DIFFHIGHLIGHTER_H