Python: Convert to Tr::tr

Change-Id: I0241053b0d51dbb1a60c43351cbff543fd52573d
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/python/pysideuicextracompiler.h

@@ -27,8 +27,7 @@
 
 #include <projectexplorer/extracompiler.h>
 
-namespace Python {
-namespace Internal {
+namespace Python::Internal {
 
 class PySideUicExtraCompiler : public ProjectExplorer::ProcessExtraCompiler
 {
@@ -49,5 +48,4 @@ private:
     Utils::FilePath m_pySideUic;
 };
 
-} // namespace Internal
-} // namespace Python
+} // Python::Internal