[folks] Release unstable 0.15.4 version

[Jordan Petridis <jpetridis src gnome org>]

commit 08c981563112d9def156286033e8c82a937d7fc6
Author: Jordan Petridis <jordan centricular com>
Date:   Mon Jan 17 23:10:43 2022 +0200

    Release unstable 0.15.4 version

 NEWS | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/NEWS b/NEWS
index 962f5049..682a46e2 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,11 @@
+Overview of changes from libfolks 0.15.3 to libfolks 0.15.4
+===========================================================
+
+Bugs fixed:
+  * Fix docs build against newer eds version
+  * Fix build against newer eds version
+  * Remove volatile keyword from tests
+
 Overview of changes from libfolks 0.15.2 to libfolks 0.15.3
 ===========================================================