build: bump tree_sitter/core from 6ef7685 to 12fb318

Bumps [tree_sitter/core](https://github.com/tree-sitter/tree-sitter) from `6ef7685` to `12fb318`.
- [Release notes](https://github.com/tree-sitter/tree-sitter/releases)
- [Commits](tree-sitter/tree-sitter@6ef7685...12fb318)

---
updated-dependencies:
- dependency-name: tree_sitter/core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]