Note in readme about go analysis in macos-latest

Author: anaarmas

README.md

@@ -137,7 +137,7 @@ env:
 
 to `github/codeql-action/analyze`.
 
-### If you do not use a vendor directory
+#### If you do not use a vendor directory
 
 Dependencies on public repositories should just work. If you have dependencies on private repositories, one option is to use `git config` and a [personal access token](https://help.github.com/en/github/authenticating-to-github/creating-a-personal-access-token-for-the-command-line) to authenticate when downloading dependencies. Add a section like
 
@@ -163,6 +163,10 @@ dotnet build /p:UseSharedCompilation=false
 
 Version 3 does not require the additional flag.
 
+### Analysing Go together with other languages on `macos-latest`
+
+This is currently not possible for Java, C/C++, or C#.
+
 ## License
 
 This project is released under the [MIT License](LICENSE).