build(deps): bump spectator-api from 1.3.1 to 1.3.5

Bumps [spectator-api](https://github.com/Netflix/spectator) from 1.3.1 to 1.3.5.
- [Release notes](https://github.com/Netflix/spectator/releases)
- [Changelog](https://github.com/Netflix/spectator/blob/main/CHANGELOG.md)
- [Commits](Netflix/spectator@v1.3.1...v1.3.5)

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

Signed-off-by: dependabot[bot] <support@github.com>

zuul-core/build.gradle

@@ -12,7 +12,7 @@ dependencies {
     api 'com.fasterxml.jackson.core:jackson-databind:2.13.2'
 
     api "com.netflix.archaius:archaius-core:0.7.7"
-    api "com.netflix.spectator:spectator-api:1.3.1"
+    api "com.netflix.spectator:spectator-api:1.3.5"
     api "com.netflix.netflix-commons:netflix-commons-util:0.3.0"
 
     api project(":zuul-discovery")