build: bump core from 6b84118 to ab6c98e in the submodules group

Bumps the submodules group with 1 update: [core](https://github.com/tree-sitter/tree-sitter).


Updates `core` from `6b84118` to `ab6c98e`
- [Release notes](https://github.com/tree-sitter/tree-sitter/releases)
- [Commits](tree-sitter/tree-sitter@6b84118...ab6c98e)

---
updated-dependencies:
- dependency-name: core
  dependency-version: ab6c98eed7ec979cfeb6de97dc5404930621cc82
  dependency-type: direct:production
  dependency-group: submodules
...

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

Author: dependabot[bot]