build(deps): bump bitflags from 2.0.2 to 2.1.0 (#6699)

Bumps [bitflags](https://github.com/bitflags/bitflags) from 2.0.2 to 2.1.0.
- [Release notes](https://github.com/bitflags/bitflags/releases)
- [Changelog](https://github.com/bitflags/bitflags/blob/main/CHANGELOG.md)
- [Commits](https://github.com/bitflags/bitflags/compare/2.0.2...2.1.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

helix-tui/Cargo.toml

@@ -16,7 +16,7 @@ include = ["src/**/*", "README.md"]
 default = ["crossterm"]
 
 [dependencies]
-bitflags = "2.0"
+bitflags = "2.1"
 cassowary = "0.3"
 unicode-segmentation = "1.10"
 crossterm = { version = "0.26", optional = true }