Update RELEASENOTES.md

RELEASENOTES.md

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-Version 3.3.3
+Version 3.3.4
 ====
+
 Please see the [Release Notes for 3.3](https://github.com/mikebrady/shairport-sync/releases/tag/3.3).
 
+This is Version 3.3.3 with a small compilation error fixed.
+
+Version 3.3.3
+====
+
 **Bug Fixes**
 * Fixes a deferred crash that occurred in Ubuntu 14.04: the `shairport-sync` daemon would silently die after a fairly long period. It typically happened just after a DHCP address was renewed. The problem seemed to be related to having more than one `avahi` threaded polling loop (though this isn't documented anywhere). The fix was to consolidate the `avahi` stuff down to one threaded polling loop. Addresses issue [#895](https://github.com/mikebrady/shairport-sync/issues/895). Thanks to [Hans (the) MCUdude](https://github.com/MCUdude) for reporting and for initial troubleshooting.