Add missing bundle version metadata, this fixes the application not being searchable in launchpad.

CURA-6867

UltiMaker-Cura.spec.jinja

@@ -141,6 +141,7 @@ class UMBUNDLE(BUNDLE):
             "CFBundleIconFile": os.path.basename(self.icon),
             "CFBundleInfoDictionaryVersion": "6.0",
             "CFBundlePackageType": "APPL",
+            "CFBundleVersionString": self.version,
             "CFBundleShortVersionString": self.version,
         }