Update changelog

Author: octref

CHANGELOG.md

@@ -11,7 +11,7 @@
 - 🙌 Add command `Vetur: Restart VLS (Vue Language Server)`. Thanks to contribution from [@yoyo930021](https://github.com/yoyo930021). #2331.
 - 🙌 Fix no complete literal string union. Thanks to contribution from [@yoyo930021](https://github.com/yoyo930021). #2300 and #2353.
 - 🙌 Add --version command. Thanks to contribution from [@andrewisaburden](https://github.com/andrewisaburden). #2337.
-- 🙌 Support optional deprecated when completion. Thanks to contribution from [@yoyo930021](https://github.com/yoyo930021). #2326 and #2357.
+- 🙌 Complete with `?.` for optional properies in completion. Thanks to contribution from [@yoyo930021](https://github.com/yoyo930021). #2326 and #2357.
 
 ### 0.28.0 | 2020-09-23 | [VSIX](https://marketplace.visualstudio.com/_apis/public/gallery/publishers/octref/vsextensions/vetur/0.28.0/vspackage)