Bump jbuilder from 2.11.5 to 2.12.0

Bumps [jbuilder](https://github.com/rails/jbuilder) from 2.11.5 to 2.12.0.
- [Release notes](https://github.com/rails/jbuilder/releases)
- [Commits](rails/jbuilder@v2.11.5...v2.12.0)

---
updated-dependencies:
- dependency-name: jbuilder
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -147,7 +147,7 @@ GEM
     irb (1.12.0)
       rdoc
       reline (>= 0.4.2)
-    jbuilder (2.11.5)
+    jbuilder (2.12.0)
       actionview (>= 5.0.0)
       activesupport (>= 5.0.0)
     jquery-rails (4.6.0)