Bump octocatalog-diff from 2.1.0 to 2.3.1 in the bundler-prod group

Bumps the bundler-prod group with 1 update: [octocatalog-diff](https://github.com/github/octocatalog-diff).


Updates `octocatalog-diff` from 2.1.0 to 2.3.1
- [Release notes](https://github.com/github/octocatalog-diff/releases)
- [Changelog](https://github.com/github/octocatalog-diff/blob/master/doc/CHANGELOG.md)
- [Commits](github/octocatalog-diff@2.1.0...2.3.1)

---
updated-dependencies:
- dependency-name: octocatalog-diff
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: bundler-prod
...

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

Gemfile.lock

@@ -62,11 +62,12 @@ GEM
     multi_xml (0.6.0)
     mutex_m (0.2.0)
     net-ssh (7.2.3)
-    octocatalog-diff (2.1.0)
+    octocatalog-diff (2.3.1)
       diffy (>= 3.1.0)
       hashdiff (>= 0.3.0)
-      httparty (>= 0.11.0)
+      httparty (>= 0.21.0)
       parallel (>= 1.12.0)
+      puppet (>= 5.5.0)
       rugged (>= 0.25.0b2)
     octokit (9.1.0)
       faraday (>= 1, < 3)