Merge pull request #201770 from vbgl/smtube-qt-5.15

pkgs/top-level/all-packages.nix

···
 
   smplayer = libsForQt5.callPackage ../applications/video/smplayer { };
 
-  smtube = libsForQt514.callPackage ../applications/video/smtube {};
+  smtube = libsForQt5.callPackage ../applications/video/smtube {};
 
   softmaker-office = callPackage ../applications/office/softmaker/softmaker_office.nix {};