Update languages.yml

[AcariusTV]

I added the language Boom, which is not yet taken.

• Sample source:
  • https://github.com/AcariusTV/Boom/blob/main/snippets/hello-world.boom
• Syntax highlighting grammar: https://github.com/AcariusTV/Boom/blob/main/syntaxes/boom.tmLanguage.json
• I have added a color
  • #c26a51
  • Rationale: I selected this color, because it resembles fire, which you would expect when you hear Boom

[Real-Packet]

The sample is not available. Also, this doesn't follow the contributing guidelines because hello world examples are not valid samples. https://github.com/github-linguist/linguist/blob/f0aebbe90d3b9b9bae5b7258f99370def1ee489f/CONTRIBUTING.md#adding-a-language

[lildude]

Please follow the instructions in the CONTRIBUTING.md file.

Please also use the PR template. This PR will be closed if these changes aren't implemented.