Bump json from 2.7.5 to 2.7.6 (#4022)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -210,7 +210,7 @@ GEM
       actionview (>= 5.0.0)
       activesupport (>= 5.0.0)
     jmespath (1.6.2)
-    json (2.7.5)
+    json (2.7.6)
     kaminari (1.2.2)
       activesupport (>= 4.1.0)
       kaminari-actionview (= 1.2.2)