Fix shadow warning in wxHtmlHelpDialog ctor declaration

This is similar to 858248d055 (Fix declaration shadow warning in
wxHtmlHelpFrame, 2021-04-21) and fixes another -Wshadow from gcc 11 by
getting rid of the last parameter confusingly named as its type.

See #19153.

include/wx/html/helpdlg.h

@@ -40,7 +40,7 @@ class WXDLLIMPEXP_HTML wxHtmlHelpDialog : public wxDialog
 
 public:
     wxHtmlHelpDialog(wxHtmlHelpData* data = NULL) { Init(data); }
-    wxHtmlHelpDialog(wxWindow* parent, wxWindowID wxWindowID,
+    wxHtmlHelpDialog(wxWindow* parent, wxWindowID id,
                     const wxString& title = wxEmptyString,
                     int style = wxHF_DEFAULT_STYLE, wxHtmlHelpData* data = NULL);
     virtual ~wxHtmlHelpDialog();