build(deps): bump tree-sitter from 0.19.5 to 0.20.9

Bumps [tree-sitter](https://github.com/tree-sitter/tree-sitter) from 0.19.5 to 0.20.9.
- [Release notes](https://github.com/tree-sitter/tree-sitter/releases)
- [Commits](https://github.com/tree-sitter/tree-sitter/commits)

---
updated-dependencies:
- dependency-name: tree-sitter
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -8,5 +8,5 @@ chrono = "0.4.22"
 serde = { version = "1.0", features = ["derive"] }
 tantivy = "0.19.1"
 toml = "0.5"
-tree-sitter = "0.19"
+tree-sitter = "0.20"
 tree-sitter-markdown = "0.7.1"