Bump rubocop from 1.31.1 to 1.31.2

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.31.1 to 1.31.2.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.31.1...v1.31.2)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -251,7 +251,7 @@ GEM
       net-http-persistent (~> 2.9)
       redcarpet (>= 3.0.0)
       ruby-hmac (>= 0.4.0)
-    rubocop (1.31.1)
+    rubocop (1.31.2)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)