Update changelog

CHANGELOG.md

@@ -11,6 +11,7 @@
 - Updated Timeline.vue, move announcements from sidebar to top of timeline ([228f5044](https://github.com/pixelfed/pixelfed/commit/228f5044))
 - Updated lexer autolinker and extractor, add support for mentioned usernames containing dashes, periods and underscore characters ([f911c96d](https://github.com/pixelfed/pixelfed/commit/f911c96d))
 - Updated Story apis, move FE to v0 and add v1 for oauth clients ([92654fab](https://github.com/pixelfed/pixelfed/commit/92654fab))
+- Updated robots.txt ([25101901](https://github.com/pixelfed/pixelfed/commit/25101901))
 
 ## [v0.10.8 (2020-01-29)](https://github.com/pixelfed/pixelfed/compare/v0.10.7...v0.10.8)
 ### Added