Update README.fuchsia to correct libxml2 version

The repository was updated to libxml2 v2.10.13, reflect the new version
in the README for proper version auditing.

Bug: b/278335544
Test: N/A - README update only.
Change-Id: I4c1e6a4cf4b9a686241489d4b748a1e1cc621a61
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/libxml2/+/849077
Reviewed-by: Craig Stout <cstout@google.com>
diff --git a/README.fuchsia b/README.fuchsia
index d27fde1..06fc058 100644
--- a/README.fuchsia
+++ b/README.fuchsia
@@ -3,10 +3,10 @@
 License: MIT
 License File: Copyright
 Upstream Git: https://github.com/GNOME/libxml2
-Version: 2.9.14
+Version: 2.10.13
 Description:
 
-This is the Fuchsia build of libxml2 based off of upstream's v2.9.14 release.
+This is the Fuchsia build of libxml2 based off of upstream's v2.10.13 release.
 
 Local Modifications:
 - The 'config.h' and 'include/libxml2/xmlversion.h' files are generated via the