Mark #1499: as fixed in changelog

CHANGELOG.md

@@ -12,6 +12,7 @@ Find out more about isort's release policy [here](https://pycqa.github.io/isort/
   - Fixed #1461: Quiet config option not respected by file API in some circumstances.
   - Fixed #1482: pylama integration is not working correctly out-of-the-box.
   - Fixed #1492: --check does not work with stdin source.
+  - Fixed #1499: isort gets confused by single line, multi-line style comments when using float-to-top.
 
 ### 5.5.3 [Hotfix] September 20, 2020
   - Fixed #1488: in rare cases isort can mangle `yield from` or `raise from` statements.