[librsvg/librsvg-2.50] Update NEWS

[Federico Mena Quintero <federico src gnome org>]

commit 41acc4ad4990fba56ec97e65abee35fe7b8bff7a
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue May 25 14:04:11 2021 -0500

    Update NEWS

 NEWS | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
---
diff --git a/NEWS b/NEWS
index 7b683d84..970d9fe3 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,21 @@
+==============
+Version 2.50.6
+==============
+
+This release fixes an important bug about text spacing.  The bug fix
+requires an update to at least Pango 1.44.  Sorry for the increased
+requirements!
+
+- Librsvg now requires at least Pango 1.44.
+
+- #730 - Incorrect text spacing when the transform is not 1:1.  You
+  can see this when a small font-size is scaled up due to a
+  transform.  It is less visible for a large font-size scaled down.
+
+- #704 - Fix circle/ellipse in paths when they are made out of a
+  single Arc command.
+
+
 ==============
 Version 2.50.5
 ==============