Update changelog and readme

Author: JoeRobich

CHANGELOG.md

@@ -26,6 +26,7 @@
 
 ## 1.23.13 (July 13th, 2021)
 * Fixes Razor editing support (PR: [#4642](https://github.com/OmniSharp/omnisharp-vscode/pull/4642))
+* Show C# project files in the project selector ([#4633](https://github.com/OmniSharp/omnisharp-vscode/issues/4633), PR: [#4644](https://github.com/OmniSharp/omnisharp-vscode/pull/4644))
 * Use new CompletionItem label API ([#4640](https://github.com/OmniSharp/omnisharp-vscode/issues/4640), PR: [#4648](https://github.com/OmniSharp/omnisharp-vscode/pull/4648))
 * Support V2 version of GoToDefinition, which can show more than one location for partial types and show source-generated file information (PR: [#4581](https://github.com/OmniSharp/omnisharp-vscode/pull/4581))
 * Add command 'listRemoteDockerProcess' and variable 'pickRemoteDockerProcess' ([#4607](https://github.com/OmniSharp/omnisharp-vscode/issues/4607), PR: [#4617](https://www.github.com/OmniSharp/omnisharp-vscode/pull/4617))

README.md

@@ -42,6 +42,7 @@ For MacOS and Linux users who have Mono installed, this means you will need to s
 
 ## What's new in 1.23.13
 * Fixes Razor editing support (PR: [#4642](https://github.com/OmniSharp/omnisharp-vscode/pull/4642))
+* Show C# project files in the project selector ([#4633](https://github.com/OmniSharp/omnisharp-vscode/issues/4633), PR: [#4644](https://github.com/OmniSharp/omnisharp-vscode/pull/4644))
 * Use new CompletionItem label API ([#4640](https://github.com/OmniSharp/omnisharp-vscode/issues/4640), PR: [#4648](https://github.com/OmniSharp/omnisharp-vscode/pull/4648))
 * Support V2 version of GoToDefinition, which can show more than one location for partial types and show source-generated file information (PR: [#4581](https://github.com/OmniSharp/omnisharp-vscode/pull/4581))
 * Add command 'listRemoteDockerProcess' and variable 'pickRemoteDockerProcess' ([#4607](https://github.com/OmniSharp/omnisharp-vscode/issues/4607), PR: [#4617](https://www.github.com/OmniSharp/omnisharp-vscode/pull/4617))