[gnome-online-accounts/wip/rishi/is-supported-provider-since-tag] dbus: Add missing since tag for IsSupportedProvider

[Debarshi Ray <debarshir src gnome org>]

commit 51a6cba674db833526f82e24366fdb79494af954
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Feb 11 15:55:59 2020 +0100

    dbus: Add missing since tag for IsSupportedProvider
    
    Fallout from 19c467490c24916712b0068ee6ef48c06e2f7b62
    
    https://gitlab.gnome.org/GNOME/gnome-online-accounts/-/merge_requests/68

 data/dbus-interfaces.xml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/data/dbus-interfaces.xml b/data/dbus-interfaces.xml
index 69eac79a..73844783 100644
--- a/data/dbus-interfaces.xml
+++ b/data/dbus-interfaces.xml
@@ -431,6 +431,8 @@
         Checks if a certain type of provider of online accounts (for example,
         "google" or "lastfm") is supported. If @provider_type is supported,
         then @is_supported is set to %TRUE.
+
+        @since: 3.36.0
     -->
     <method name="IsSupportedProvider">
       <arg name="provider_type" type="s" direction="in"/>