[folks] Release unstable 0.15.5 version

[Jordan Petridis <jpetridis src gnome org>]

commit c75c2a55f171ec778a78d3d510add6993b353487
Author: Jordan Petridis <jordan centricular com>
Date:   Wed Mar 23 14:39:19 2022 +0200

    Release unstable 0.15.5 version

 NEWS | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/NEWS b/NEWS
index 682a46e2..2c9da7c7 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+Overview of changes from libfolks 0.15.4 to libfolks 0.15.5
+===========================================================
+
+Bugs fixed:
+  * vapi: Add missing generic type argument
+
 Overview of changes from libfolks 0.15.3 to libfolks 0.15.4
 ===========================================================