build(deps): bump rack from 2.2.18 to 2.2.19 (#818)

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

Author: dependabot[bot]

Gemfile.lock

@@ -283,7 +283,7 @@ GEM
       activesupport (>= 3.0.0)
     raabro (1.4.0)
     racc (1.8.1)
-    rack (2.2.18)
+    rack (2.2.19)
     rack-session (1.0.2)
       rack (< 3)
     rack-test (2.2.0)