Bump nio4r from 2.7.1 to 2.7.3

Bumps [nio4r](https://github.com/socketry/nio4r) from 2.7.1 to 2.7.3.
- [Release notes](https://github.com/socketry/nio4r/releases)
- [Changelog](https://github.com/socketry/nio4r/blob/main/changes.md)
- [Commits](socketry/nio4r@v2.7.1...v2.7.3)

---
updated-dependencies:
- dependency-name: nio4r
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -123,7 +123,7 @@ GEM
     multi_json (1.15.0)
     multipart-post (2.4.1)
     nenv (0.3.0)
-    nio4r (2.7.1)
+    nio4r (2.7.3)
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)