Replace erroneous comma with a semicolon in keyboard sample.

Fix typo in the sample, comma was used instead of a semicolon. The code still
worked correctly but make it look correctly too now.

Closes #13453.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69179 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/keyboard/keyboard.cpp

@@ -132,7 +132,7 @@ MyFrame::MyFrame(const wxString& title)
     SetMenuBar(menuBar);
 
     m_inputWin = new wxWindow(this, wxID_ANY, wxDefaultPosition, wxSize(-1, 50),
-                              wxRAISED_BORDER),
+                              wxRAISED_BORDER);
     m_inputWin->SetBackgroundColour(*wxBLUE);
 
     wxTextCtrl *headerText = new wxTextCtrl(this, wxID_ANY, "",