Bump psych from 5.2.3 to 5.2.6

Bumps [psych](https://github.com/ruby/psych) from 5.2.3 to 5.2.6.
- [Release notes](https://github.com/ruby/psych/releases)
- [Commits](ruby/psych@v5.2.3...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] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -88,7 +88,7 @@ GEM
       method_source (~> 1.0)
     pry-nav (1.0.0)
       pry (>= 0.9.10, < 0.15)
-    psych (5.2.3)
+    psych (5.2.6)
       date
       stringio
     racc (1.8.1)
@@ -128,7 +128,7 @@ GEM
     rubyzip (2.4.1)
     semver2 (3.4.2)
     sorbet-runtime (0.5.12130)
-    stringio (3.1.2)
+    stringio (3.1.7)
     test-unit (3.6.8)
       power_assert
     thor (1.3.2)