Add faraday-retry gem

In order to remove an information text related to Faraday every time we
execute `pronto run`:
> To use retry middleware with Faraday v2.0+, install faraday-retry gem

Gemfile

@@ -94,6 +94,7 @@ group :development do
   gem "capistrano3-delayed-job", "~> 1.7.6"
   gem "capistrano3-puma", "~> 5.2.0"
   gem "erb_lint", "~> 0.6.0", require: false
+  gem "faraday-retry", "~> 2.2.1", require: false
   gem "mdl", "~> 0.13.0", require: false
   gem "pronto", "~> 0.11.2", require: false
   gem "pronto-erb_lint", "~> 0.1.6", require: false

Gemfile.lock

@@ -228,6 +228,8 @@ GEM
       logger
     faraday-net_http (3.4.0)
       net-http (>= 0.5.0)
+    faraday-retry (2.2.1)
+      faraday (~> 2.0)
     ffi (1.17.0)
     fiber-storage (1.0.0)
     file_validators (3.0.0)
@@ -738,6 +740,7 @@ DEPENDENCIES
   exiftool_vendored (~> 12.97.0)
   factory_bot_rails (~> 6.4.3)
   faker (~> 3.4.2)
+  faraday-retry (~> 2.2.1)
   file_validators (~> 3.0.0)
   font-awesome-sass (~> 5.15.1)
   foundation_rails_helper (~> 4.0.1)