rubocop: Align the operands of an expression

C: Style/MultilineOperationIndentation:
Align the operands of an expression in an assignment
spanning multiple lines.

lib/ci/api/builds.rb

@@ -169,8 +169,8 @@ module Ci
           build.artifacts_metadata = metadata
           build.artifacts_expire_in =
             params['expire_in'] ||
-              Gitlab::CurrentSettings.current_application_settings
-                .default_artifacts_expire_in
+            Gitlab::CurrentSettings.current_application_settings
+              .default_artifacts_expire_in
 
           if build.save
             present(build, with: Entities::BuildDetails)