docs: fix typo in FileService.h doc comment

[davin-core]

This PR fixes a small typo in the documentation comment for the appendFile function in
src/tck/include/file/FileService.h.
This has been corrected to:
@param params The parameters to use to append a file.

Preserve all other imports and existing logic

Fixes #1257

[github-actions]

Hey @davin-core 👋 thanks for the PR!
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[Akshat8510]

Hey @davin-core , thanks for the PR!
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[Akshat8510]

LGTM! Thanks for contributing :)

[rwalworth]

LGTM, the fix is correct, minimal, and brings the appendFile doc comment into consistency with all the other functions in FileService.h. Running the workflows now and will merge!

Congratulations on your first contribution to the Hiero C++ SDK, @davin-core! 🎉 Thank you for taking the time to contribute!