updates
* Update tree-sitter to 0.22.6 by eed3si9n in https://github.com/tree-sitter/tree-sitter-scala/pull/379
* Exclude colon, at, and equal from single opchar by eed3si9n in https://github.com/tree-sitter/tree-sitter-scala/pull/394
behind the scenes
* Fix GitHub Actions by eed3si9n in https://github.com/tree-sitter/tree-sitter-scala/pull/390
**Full Changelog**: https://github.com/tree-sitter/tree-sitter-scala/compare/v0.21.0...v0.22.0