Bump com.netflix.spectator:spectator-reg-atlas from 1.8.17 to 1.9.0 (#6711)

Bumps [com.netflix.spectator:spectator-reg-atlas](https://github.com/Netflix/spectator) from 1.8.17 to 1.9.0.
- [Release notes](https://github.com/Netflix/spectator/releases)
- [Changelog](https://github.com/Netflix/spectator/blob/main/CHANGELOG.md)
- [Commits](Netflix/spectator@v1.8.17...v1.9.0)

---
updated-dependencies:
- dependency-name: com.netflix.spectator:spectator-reg-atlas
  dependency-version: 1.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -67,7 +67,7 @@ reactor = "2022.0.22"
 rest-assured = "5.5.6"
 signalfx = "1.0.49"
 slf4j = "1.7.36"
-spectator-atlas = "1.8.17"
+spectator-atlas = "1.9.0"
 spring5 = "5.3.39"
 spring6 = "6.2.10"
 spring-javaformat = "0.0.47"