Should work on "type == yaml" not on file extension

[flypenguin]

Our YAML files have the extension *.yaml, which apparently triggers the error message "works only on *.yml files".

Also, sometimes we have template files or snippets without .yaml extension, but in VS Code we can switch to "file type == YAML". That is what the plugin should depend upon, not a file extension which can be basically anything.

Otherwise: Amazing idea, I really hope you change that – your exention is super useful :)