Bump searchkick from 5.3.1 to 6.1.2

Bumps [searchkick](https://github.com/ankane/searchkick) from 5.3.1 to 6.1.2.
- [Changelog](https://github.com/ankane/searchkick/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ankane/searchkick/compare/v5.3.1...v6.1.2)

---
updated-dependencies:
- dependency-name: searchkick
  dependency-version: 6.1.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Gemfile.lock

@@ -687,9 +687,8 @@ GEM
       tilt
     scout_apm (6.2.0)
       parser
-    searchkick (5.3.1)
-      activemodel (>= 6.1)
-      hashie
+    searchkick (6.1.2)
+      activemodel (>= 7.2)
     securerandom (0.4.1)
     selenium-webdriver (4.44.0)
       base64 (~> 0.2)