Fix incorrect libraries in the documentation.

Use wxcore for the GUI classes that were mistakenly documented as belonging to
the wxbase library.

Closes #14783.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72786 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/renderer.h

@@ -77,7 +77,7 @@ enum wxTitleBarButton
     It doesn't have any methods and all of its fields are constant, so they can
     only be examined but not modified.
 
-    @library{wxbase}
+    @library{wxcore}
     @category{gdi}
 */
 struct wxSplitterRenderParams
@@ -111,7 +111,7 @@ struct wxSplitterRenderParams
     wxRendererNative::DrawHeaderButton() to specify custom values used to draw
     the text or bitmap label.
 
-    @library{wxbase}
+    @library{wxcore}
     @category{gdi}
 */
 struct wxHeaderButtonParams
@@ -561,7 +561,7 @@ public:
     renderer which has the age greater or equal to its age. This verification is
     done by IsCompatible() method.
 
-    @library{wxbase}
+    @library{wxcore}
     @category{gdi}
 */
 struct wxRendererVersion