news: Fix typo (Libivrt -> Libvirt)

Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

docs/news.xml

@@ -95,7 +95,7 @@
         <description>
           For a long time libvirt was assuming that a backing file is RAW when
           the format was not specified. This didn't pose a problem until blockdev
-          support was enabled in last release. Libivrt now requires that
+          support was enabled in last release. Libvirt now requires that
           the format is specified in the image metadata or domain XML and the
           VM will refuse to start otherwise. Additionally the error message
           now links to the knowledge base which summarizes how to fix the images.