Upgrade metadata for v3.4.0

Author: lazaa32

metadata.txt

@@ -5,8 +5,9 @@
 [general]
 name=MapTiler
 qgisMinimumVersion=3.24
+supportsQt6=yes
 description=Street and satellite base maps with vector tiles
-version=3.3.2
+version=3.4.0
 author=MapTiler
 email=info@maptiler.com