fix checkout version

Author: seuros

.github/workflows/ci.yml

@@ -9,6 +9,8 @@ on:
 jobs:
   rspec:
     runs-on: ubuntu-latest
+    env:
+      RAILS_ENV: test
     services:
       mysql:
         image: mysql/mysql-server:8.0.30
@@ -67,7 +69,7 @@ jobs:
             adapter: jdbcpostgresql://closure_tree:closure_tree@0/closure_tree_test
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1

Gemfile

@@ -4,8 +4,8 @@ source 'https://rubygems.org'
 
 gemspec
 
-group :development do
-  platform :mri do
+platform :mri do
+  group :development do
     gem 'bump', '~> 0.10.0'
     gem 'github_changelog_generator', '~> 1.16'
   end