Examples: fix superfluous ';' in undo example

There was a superfluous ';' at the end of main. No compiler will
complain I guess but the examples should be syntactically correct.

Task-number: QTBUG-55128
Change-Id: I2ddc3041ed05106d04fb4f4ad74735c72c9ddb26
Reviewed-by: André Hartmann <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/examples/widgets/tools/undo/main.cpp b/examples/widgets/tools/undo/main.cpp
index eff44ca3e8d..a5ec1b1b834 100644
--- a/examples/widgets/tools/undo/main.cpp
+++ b/examples/widgets/tools/undo/main.cpp
@@ -62,4 +62,4 @@ int main(int argc, char **argv)
     win.show();
 
     return app.exec();
-};
+}