Ensure runner_type is updated correctly when assigning shared runner to project

app/models/ci/runner.rb

@@ -108,7 +108,11 @@ module Ci
     end
 
     def assign_to(project, current_user = nil)
+      if shared?
         self.is_shared = false if shared?
+        self.runner_type = :project_type
+      end
+
       self.save
       project.runner_projects.create(runner_id: self.id)
     end

spec/models/ci/runner_spec.rb

@@ -207,6 +207,7 @@ describe Ci::Runner do
     end
 
     it { expect(shared_runner).to be_specific }
+    it { expect(shared_runner).to be_project_type }
     it { expect(shared_runner.projects).to eq([project]) }
     it { expect(shared_runner.only_for?(project)).to be_truthy }
   end