Mention two more bug fixes in README.txt

README.txt

@@ -117,6 +117,8 @@ Bug Fixes
    * Hover indication on note track channel toggle appears on all tracks (when 
      they rerender)
    * Installer has old logo for 2.2.1 and 2.2.0
+   * Un-muting with a single track unnecessarily activates the Solo button
+   * Applying chain to file should zoom-to-fit
    
  See also: https://wiki.audacityteam.org/wiki/Release_Notes_2.2.2
  and: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.2.2