Add `Containerfile` file-type for dockerfile language (#5873)

languages.toml

@@ -1072,8 +1072,8 @@ source = { git = "https://github.com/tree-sitter/tree-sitter-scala", rev = "f6bb
 name = "dockerfile"
 scope = "source.dockerfile"
 injection-regex = "docker|dockerfile"
-roots = ["Dockerfile"]
+roots = ["Dockerfile", "Containerfile"]
-file-types = ["Dockerfile", "dockerfile"]
+file-types = ["Dockerfile", "dockerfile", "Containerfile", "containerfile"]
 comment-token = "#"
 indent = { tab-width = 2, unit = "  " }
 language-server = { command = "docker-langserver", args = ["--stdio"] }