1; https://github.com/nvim-treesitter/nvim-treesitter/blob/ce4adf11cfe36fc5b0e5bcdce0c7c6e8fbc9798a/queries/hcl/injections.scm
2
3(heredoc_template
4  (template_literal) @injection.content
5  (heredoc_identifier) @injection.language
6  (#downcase! @injection.language))