[folks] Release unstable version 1.15.2

[Niels De Graef <nielsdg src gnome org>]

commit 4444b5b10892f93ef9d752da62f5c6da2fe4316c
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Mon Feb 15 11:25:02 2021 +0100

    Release unstable version 1.15.2

 NEWS | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/NEWS b/NEWS
index 331d42de..b047ded5 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,10 @@
+Overview of changes from libfolks 0.15.1 to libfolks 0.15.2
+===========================================================
+
+Bugs fixed:
+  * Fixed build errors after API version bump
+  * Fixed gtk-doc errors due to missing version entities
+
 Overview of changes from libfolks 0.14.0 to libfolks 0.15.1
 ===========================================================