Add changelog entry for #505

Author: yujinakayama

Changelog.md

@@ -4,6 +4,8 @@ Bug Fixes:
 
 * Use `Mutex#owned?` to allow `RSpec::Support::ReentrantMutex` to work in
   nested Fibers on Ruby 3.0 and later. (Benoit Daloze, #503, #504)
+* Support `end`-less methods in `RSpec::Support::Source::Token`
+  so that RSpec won't hang when an `end`-less method raises an error. (Yuji Nakayama, #505)
 
 ### 3.10.2 / 2021-01-28
 [Full Changelog](http://github.com/rspec/rspec-support/compare/v3.10.1...v3.10.2)