Add tree-sitter/0.25.6

[jan-kelemen]

Summary

Changes to recipe: tree-sitter/0.25.6

Motivation

Version bump https://github.com/tree-sitter/tree-sitter/compare/v0.25.1...v0.25.6

Details

config.yml and conandata.yml point to the newly created tree-sitter/0.25.6.

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• [x] Read the contributing guidelines
• [x] Checked that this PR is not a duplicate: list of PRs by recipe
• [x] Tested locally with at least one configuration using a recent version of Conan

[CLAassistant]

All committers have signed the CLA.