Bump com.netflix.spectator:spectator-api from 1.7.0 to 1.7.8

Bumps [com.netflix.spectator:spectator-api](https://github.com/Netflix/spectator) from 1.7.0 to 1.7.8.
- [Release notes](https://github.com/Netflix/spectator/releases)
- [Changelog](https://github.com/Netflix/spectator/blob/main/CHANGELOG.md)
- [Commits](Netflix/spectator@v1.7.0...v1.7.8)

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

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

extensions-contrib/spectator-histogram/pom.xml

@@ -38,7 +38,7 @@
     <dependency>
       <groupId>com.netflix.spectator</groupId>
       <artifactId>spectator-api</artifactId>
-      <version>1.7.0</version>
+      <version>1.7.8</version>
     </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>