Bump redis-rack from 2.0.6 to 2.1.4

Bumps [redis-rack](https://redis-store.org/redis-rack) from 2.0.6 to 2.1.4.

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -85,7 +85,7 @@ gem "redis", "~> 4.2.5" # Redis ruby client
 # We need to investigate why exactly, in the meantime we are hardcoding these two transitive dependencies
 # (added by redis-rails) to keep them at the latest working version
 gem "redis-actionpack", "5.1.0" # Redis session store for ActionPack. Used for storing the Rails session in Redis.
-gem "redis-rack", "2.0.6" # Redis Store for Rack applications
+gem "redis-rack", "2.1.4" # Redis Store for Rack applications
 
 gem "redis-rails", "~> 5.0.2" # Redis for Ruby on Rails
 gem "request_store", "~> 1.5" # RequestStore gives you per-request global storage

Gemfile.lock

@@ -602,14 +602,14 @@ GEM
  redis-activesupport (5.2.0)
  activesupport (>= 3, < 7)
  redis-store (>= 1.3, < 2)
- redis-rack (2.0.6)
- rack (>= 1.5, < 3)
+ redis-rack (2.1.4)
+ rack (>= 2.0.8, < 3)
  redis-store (>= 1.2, < 2)
  redis-rails (5.0.2)
  redis-actionpack (>= 5.0, < 6)
  redis-activesupport (>= 5.0, < 6)
  redis-store (>= 1.2, < 2)
- redis-store (1.9.0)
+ redis-store (1.9.1)
  redis (>= 4, < 5)
  regexp_parser (1.8.2)
  request_store (1.5.0)
@@ -942,7 +942,7 @@ DEPENDENCIES
  redcarpet (~> 3.5)
  redis (~> 4.2.5)
  redis-actionpack (= 5.1.0)
- redis-rack (= 2.0.6)
+ redis-rack (= 2.1.4)
  redis-rails (~> 5.0.2)
  request_store (~> 1.5)
  reverse_markdown (~> 2.0)