Switch to using yml for generated yaml files (#1246)

See: #1243

Author: nickcharlton

lib/generators/suspenders/ci_generator.rb

@@ -14,7 +14,7 @@ class CiGenerator < Rails::Generators::Base
 
       def ci_files
         empty_directory ".github/workflows"
-        template "ci.yml", ".github/workflows/ci.yaml"
+        template "ci.yml", ".github/workflows/ci.yml"
         template "dependabot.yml", ".github/dependabot.yaml"
       end
 

test/generators/suspenders/ci_generator_test.rb

@@ -14,7 +14,7 @@ class CiGeneratorTest < Rails::Generators::TestCase
         with_database "postgresql" do
           run_generator
 
-          assert_file app_root(".github/workflows/ci.yaml")
+          assert_file app_root(".github/workflows/ci.yml")
           assert_file app_root(".github/dependabot.yaml")
         end
       end
@@ -24,7 +24,7 @@ class CiGeneratorTest < Rails::Generators::TestCase
           assert_raises Suspenders::Generators::DatabaseUnsupported::Error, match: "This generator requires PostgreSQL" do
             run_generator
 
-            assert_no_file app_root(".github/workflows/ci.yaml")
+            assert_no_file app_root(".github/workflows/ci.yml")
             assert_no_file app_root(".github/dependabot.yaml")
           end
         end