Bump com.netflix.spectator:spectator-reg-atlas from 1.8.3 to 1.8.4 (#5907)

Bumps [com.netflix.spectator:spectator-reg-atlas](https://github.com/Netflix/spectator) from 1.8.3 to 1.8.4.
- [Release notes](https://github.com/Netflix/spectator/releases)
- [Changelog](https://github.com/Netflix/spectator/blob/main/CHANGELOG.md)
- [Commits](Netflix/spectator@v1.8.3...v1.8.4)

---
updated-dependencies:
- dependency-name: com.netflix.spectator:spectator-reg-atlas
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -71,7 +71,7 @@ reactor = "2022.0.22"
 rest-assured = "5.5.0"
 signalfx = "1.0.49"
 slf4j = "1.7.36"
-spectator-atlas = "1.8.3"
+spectator-atlas = "1.8.4"
 spring5 = "5.3.39"
 spring6 = "6.1.16"
 spring-javaformat = "0.0.43"