[librsvg/librsvg-2.46] Update NEWS

[Federico Mena Quintero <federico src gnome org>]

commit d07f1a3ae85503f85127b931178e3464b62e081f
Author: Federico Mena Quintero <federico gnome org>
Date:   Sun Nov 24 19:36:30 2019 -0600

    Update NEWS

 NEWS | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/NEWS b/NEWS
index e93d2e55..70020ddd 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,12 @@
+Version 2.46.4
+
+- #524 - Panic when reading an invalid stylesheet URL in an XML
+  processing instruction (Paolo Borelli)
+
+- #525 - Consider specificity when applying CSS selector matches.
+
+- #504 - Provide an usage example in the librsvg crate docs.
+
 Version 2.46.3
 
 - #516 - Fix inadvertent bump in the minimum Rust version required.  The