Possible support for Bengali

[jonasbn]

In my work of deprecating and decommissioning old version I fell over a fork, with changes indicating support for Bengali.

I have reached out to the author, to ask if this is something they would like to go upstream.

Bengali is supported via Aspell

As stated in the documentation:

Additional languages can be added by request, please open an issue.

REF: https://github.com/rojopolis/spellcheck-github-actions#language-support