Add item to changelog

Author: DustinCampbell

CHANGELOG.md

@@ -7,6 +7,7 @@
 #### Project Support
 
 * Support for latest .NET Core .csproj projects updates. ([omnisharp-roslyn#705](https://github.com/OmniSharp/omnisharp-roslyn/pull/705))
+* Update 'tasks.json' and 'launch.json' to support .NET Core .csproj projects. ([#767](https://github.com/OmniSharp/omnisharp-vscode/issues/767))
 * Properly support `<NoWarn>` in MSBuild projects and specifically ignore the `CS1701` warning in .NET Core MSBuild projects. ([#967](https://github.com/OmniSharp/omnisharp-vscode/issues/967))
 * Fix global.json-based project search to also the top-level folders specified by the `"projects"` property and not just their children. ([#904](https://github.com/OmniSharp/omnisharp-vscode/issues/904) and [#962](https://github.com/OmniSharp/omnisharp-vscode/issues/962))