Bump addressable from 2.7.0 to 2.8.0 in /prom-plugin/kerbi

Bumps [addressable](https://github.com/sporkmonger/addressable) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/sporkmonger/addressable/releases)
- [Changelog](https://github.com/sporkmonger/addressable/blob/main/CHANGELOG.md)
- [Commits](sporkmonger/addressable@addressable-2.7.0...addressable-2.8.0)

---
updated-dependencies:
- dependency-name: addressable
  dependency-type: indirect
...

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

Author: dependabot[bot]

prom-plugin/kerbi/Gemfile.lock

@@ -7,7 +7,7 @@ GEM
       minitest (>= 5.1)
       tzinfo (~> 2.0)
       zeitwerk (~> 2.3)
-    addressable (2.7.0)
+    addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     concurrent-ruby (1.1.8)
     domain_name (0.5.20190701)