news: Update the news file with the log filter wildcard improvement

Signed-off-by: NErik Skultety <eskultet@redhat.com>

docs/news.xml

@@ -56,6 +56,18 @@
           supported. In fact, kernel has been supporting this since 4.10.
         </description>
       </change>
+      <change>
+        <summary>
+          logging: Introduce wildcard to log filters
+        </summary>
+        <description>
+          In an effort to deprecate the log_level variable in favour of the log
+          filters, introduce a wildcard filter, e.g. '1:*'. This change is most
+          noticeable during runtime using virt-admin, where the only way to
+          mimic the log_level's functionality has been to specify a number of
+          filters which can be a bit painful.
+        </description>
+      </change>
     </section>
     <section title="Bug fixes">
       <change>