Bump rack-utf8_sanitizer from 1.9.1 to 1.10.0

Bumps [rack-utf8_sanitizer](https://github.com/whitequark/rack-utf8_sanitizer) from 1.9.1 to 1.10.0.
- [Changelog](https://github.com/whitequark/rack-utf8_sanitizer/blob/main/CHANGELOG.md)
- [Commits](whitequark/rack-utf8_sanitizer@v1.9.1...v1.10.0)

---
updated-dependencies:
- dependency-name: rack-utf8_sanitizer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -491,7 +491,7 @@ GEM
       rack (>= 3.0.0)
     rack-test (2.2.0)
       rack (>= 1.3)
-    rack-utf8_sanitizer (1.9.1)
+    rack-utf8_sanitizer (1.10.0)
       rack (>= 1.0, < 4.0)
     rackup (2.2.1)
       rack (>= 3)