fix: Rename csharp -> cs (danymat#134)

README.md

@@ -232,7 +232,7 @@ There is a list of supported languages and fields, with their annotation style
 | --------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------- |
 | sh              | [Google Style Guide](https://google.github.io/styleguide/shellguide.html) (`"google_bash"`)                                                                                                                                                                                      | `func`, `file`                  |
 | c               | [Doxygen](https://www.doxygen.nl/manual/commands.html) (`"doxygen"`)                                                                                                                                                                                                             | `func`, `file`, `type`          |
-| csharp          | [Xmldoc](https://docs.microsoft.com/fr-fr/dotnet/csharp/language-reference/xmldoc/) (`"xmldoc"`) <br> [Doxygen](https://www.doxygen.nl/manual/commands.html) (`"doxygen"`)                                                                                                       | `func`, `file`, `class`         |
+| cs              | [Xmldoc](https://docs.microsoft.com/fr-fr/dotnet/csharp/language-reference/xmldoc/) (`"xmldoc"`) <br> [Doxygen](https://www.doxygen.nl/manual/commands.html) (`"doxygen"`)                                                                                                       | `func`, `file`, `class`         |
 | cpp             | [Doxygen](https://www.doxygen.nl/manual/commands.html) (`"doxygen"`)                                                                                                                                                                                                             | `func`, `file`, `class`         |
 | go              | [GoDoc](https://go.dev/blog/godoc) (`"godoc"`)                                                                                                                                                                                                                                   | `func`, `type`                  |
 | java            | [Javadoc](https://docs.oracle.com/javase/1.5.0/docs/tooldocs/windows/javadoc.html#documentationcomments) (`"javadoc`)                                                                                                                                                            | `func`, `class`                 |