Added Rust to supported languages for project() [skip ci]
@@ -1109,8 +1109,8 @@ This function prints its argument to stdout prefixed with WARNING:.
The first argument to this function must be a string defining the name
of this project. It is followed by programming languages that the
project uses. Supported values for languages are `c`, `cpp` (for
-`C++`), `d`, `objc`, `objcpp`, `fortran`, `java`, `cs` (for `C#`) and
-`vala`. In versions before `0.40.0` you must have at least one
+`C++`), `d`, `objc`, `objcpp`, `fortran`, `java`, `cs` (for `C#`),
+`vala` and `rust`. In versions before `0.40.0` you must have at least one
language listed.
The project name can be any string you want, it's not used for
