gems: remove hardcoded git URL for mina

It is not needed anymore.

Gemfile

@@ -120,7 +120,7 @@ end
 
 group :development, :test do
   gem 'graphql-schema_comparator'
-  gem 'mina', git: 'https://github.com/mina-deploy/mina.git', require: false # Deploy
+  gem 'mina', require: false # Deploy
   gem 'pry-byebug' # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'rspec-rails'
   gem 'simple_xlsx_reader'

Gemfile.lock

@@ -1,11 +1,3 @@
-GIT
-  remote: https://github.com/mina-deploy/mina.git
-  revision: 84fa84c7f7f94f9518ef9b7099396ab6676b5881
-  specs:
-    mina (1.2.3)
-      open4 (~> 1.3.4)
-      rake
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -423,6 +415,9 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2021.0212)
+    mina (1.2.4)
+      open4 (~> 1.3.4)
+      rake
     mini_magick (4.11.0)
     mini_mime (1.1.2)
     mini_portile2 (2.7.1)
@@ -838,7 +833,7 @@ DEPENDENCIES
   lograge
   logstash-event
   mailjet
-  mina!
+  mina
   openid_connect
   pg
   phonelib