build: bump core in the submodules group across 1 directory

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


Updates `core` from `bdfe324` to `12bc174`
- [Release notes](https://github.com/tree-sitter/tree-sitter/releases)
- [Commits](tree-sitter/tree-sitter@bdfe324...12bc174)

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

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

Author: dependabot[bot]