Bump psych from 5.2.5 to 5.2.6

Bumps [psych](https://github.com/ruby/psych) from 5.2.5 to 5.2.6.
- [Release notes](https://github.com/ruby/psych/releases)
- [Commits](ruby/psych@v5.2.5...v5.2.6)

---
updated-dependencies:
- dependency-name: psych
  dependency-version: 5.2.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -520,7 +520,7 @@ GEM
     prism (1.4.0)
     prometheus_exporter (2.2.0)
       webrick
-    psych (5.2.5)
+    psych (5.2.6)
       date
       stringio
     public_suffix (6.0.2)