Update libportal-0.6.tar.xz to 0.7.1

[elementaryBot]

🤖 This pull request was automatically generated by flathub/flatpak-external-data-checker. Please open an issue if you have any questions or complaints. 🤖

[ryonakano]

We need to update here too:

ryo@lb450m:~/work/tmp/browser (update-fb3bb34 *=)$ git diff
diff --git a/org.gnome.epiphany.json b/org.gnome.epiphany.json
index 7e5081e..b02fc34 100644
--- a/org.gnome.epiphany.json
+++ b/org.gnome.epiphany.json
@@ -19,7 +19,9 @@
             "name": "libportal",
             "buildsystem": "meson",
             "config-opts": [
-                "-Dbackends=gtk4",
+                "-Dbackend-gtk3=disabled",
+                "-Dbackend-gtk4=enabled",
+                "-Dbackend-qt5=disabled",
                 "-Dintrospection=false",
                 "-Ddocs=false"
             ],
ryo@lb450m:~/work/tmp/browser (update-fb3bb34 *=)$ 

[danirabbit]

Looks good, everything still works :tada: