Build(deps): Bump nio4r from 2.7.1 to 2.7.3 (#26922)

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](https://github.com/socketry/nio4r/compare/v2.7.1...v2.7.3)

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

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

Gemfile.lock

@@ -243,7 +243,7 @@ GEM
       timeout
     net-smtp (0.5.0)
       net-protocol
-    nio4r (2.7.1)
+    nio4r (2.7.3)
     nokogiri (1.16.4-aarch64-linux)
       racc (~> 1.4)
     nokogiri (1.16.4-arm64-darwin)