update changelog for another pre-release

Author: fdncred

CHANGELOG.md

@@ -185,3 +185,5 @@ All notable changes to the "vscode-nushell-lang" extension will be documented in
   - Add ability to start and stop lsp [#210](https://github.com/nushell/vscode-nushell-lang/pull/210)
   - Better JSONRPC logging [#211](https://github.com/nushell/vscode-nushell-lang/pull/211)
   - Fix some lints [#213](https://github.com/nushell/vscode-nushell-lang/pull/213)
+- 2.0.4 Pre-Release
+  - Don't auto-reveal output panel [#219](https://github.com/nushell/vscode-nushell-lang/pull/219)