chore(changelog): Remove square brackets

Author: gadenbuie

CHANGELOG.md

@@ -1,10 +1,10 @@
 # Change Log
 
-## [UNRELEASED]
+## UNRELEASED
 
 - The "Create Shinylive Link from Selected Files" context menu item now only appears when right-clicking on a Shiny app file (e.g., `app.py`, `app.R`, `ui.R`) or a folder. (#105)
 
-## [1.3.3]
+## 1.3.3
 
 - New `shiny.timeoutOpenBrowser` option sets the maximum time to wait (in seconds) for a Shiny app to be ready before attempting to open it in the browser. (@olivroy #82)