NEWS.md: unreleased -> release candidate 1

Author: mathiascode

NEWS.md

@@ -12,7 +12,7 @@ The current stable version of Nicotine+ is available at [DOWNLOADS.md](doc/DOWNL
 You can run the latest unstable build of Nicotine+ to test recent changes and bug fixes, see [TESTING.md](doc/TESTING.md).
 
 
-## Version 3.3.11 (Unreleased)
+## Version 3.3.11 (Release Candidate 1)
 
 ### Changes