Bump rack from 2.2.2 to 2.2.3 in /docs

dependabot[bot] · web-flow · commit d41dcacac350 · 2020-06-24T20:56:06.000Z
Bumps [rack](https://github.com/rack/rack) from 2.2.2 to 2.2.3. - [Release notes](https://github.com/rack/rack/releases) - [Changelog](https://github.com/rack/rack/blob/master/CHANGELOG.md) - [Commits](rack/rack@v2.2.2...2.2.3) Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
@@ -60,7 +60,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     parslet (1.8.2)
     public_suffix (4.0.5)
-    rack (2.2.2)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     regexp_parser (1.7.0)
