Update tests readme

DiscordChatExporter.Cli.Tests/Readme.md

@@ -10,8 +10,8 @@ In order to run these tests locally, you need to join the test server and config
     - **Using an environment variable**: set `DISCORD_TOKEN` variable to your token
 4. Run the tests: `dotnet test`
 
-> 🟣 If you're submitting a pull request, you don't _have_ to run the tests locally -- they are executed automatically by CI.
+> If you're submitting a pull request, you don't _have_ to run the tests locally -- they are executed automatically by CI.
 Running them locally can still sometimes be useful for debugging purposes though.
  
-> 🟣 If you want to have a new test case or a scenario added, please let me know in your pull request.
+> If you want to have a new test case or a scenario added, please let me know in your pull request.
 Currently, it's not possible to add them by yourself.