fix(server): use POST instead of GET for check endpoint

[mdevolde]

fix(server): use POST instead of GET for check endpoint

Why the pull request was made

This PR allows our lib to use the proper method to contact the endpoint, and btw, to avoid having all our params in web server logs (because with get, the params are in the url).

Summary of changes

• Changed the http verb from get to post for check endpoint.

Screenshots (if appropriate):

Not applicable.

How has this been tested?

Applied local tests.

Resources

• https://languagetool.org/http-api/

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (changes to documentation only)
• Refactor / code style update (non-breaking change that improves code structure or readability)
• Tests / CI improvement (adding or updating tests or CI configuration only)
• Other (please describe):

Checklist

• Followed the project's contributing guidelines.
• Updated any relevant tests.
• Updated any relevant documentation.
• Added comments to your code where necessary.
• Formatted your code, run the linters, checked types and tests.