Formatting doesn't work for `sbt` files

[mihaisoloi]

Version(s)
1.12.4

Describe the bug
scalafmt formats the sbt file just fine

To Reproduce

❯ scala-cli fmt build.sbt
[error]  build.sbt: unrecognized source type (expected .scala or .sc extension, or a directory).
If build.sbt is meant to be treated as a script, add a shebang header in its top line.
  #!/usr/bin/env -S scala-cli shebang
When a shebang header is provided, the script can then be run with the 'shebang' sub-command, even if no file extension is present.
  scala-cli shebang build.sbt

Expected behaviour
I'm expecting to have the sbt file formatted, or if it's not supported to be mentioned somewhere

[mihaisoloi]

I'm primarily trying to add scala-cli fmt as a jj fix tool.

[fix.tools.scalafmt]
command = ["scala-cli", "fmt", "-F", "--stdin","-F", "--stdout", "-F", "--assume-filename", "$path"]
patterns = ["glob:'**/*.scala'", "glob:'**/*.sbt'"]