Add pressure-vessel's overrides data dir to XDG_DATA_DIRS

Author: R1kaB3rN

flatpak/templates/com.heroicgameslauncher.hgl.yml.template

@@ -46,7 +46,7 @@ finish-args:
   - --talk-name=org.kde.StatusNotifierWatcher
   # umu
   - --filesystem=~/.var/app/org.openwinecomponents.umu.umu-launcher/data/umu
-  - --env=XDG_DATA_DIRS=/app/share
+  - --env=XDG_DATA_DIRS=/app/share:/usr/lib/extensions/vulkan/share:/usr/share:/usr/share/runtime/share:/run/host/user-share:/run/host/share:/usr/lib/pressure-vessel/overrides/share
 
 add-extensions:
   org.freedesktop.Platform.Compat.i386: