Fix a 'RSpec/ContextMethod' offense

Signed-off-by: Rémy Coutable <remy@rymai.me>

ee/spec/lib/ee/api/helpers/notes_helpers_spec.rb

@@ -36,7 +36,7 @@ describe 'NotesHelpers' do
       stub_licensed_features(epics: true)
     end
 
-    context '#find_noteable' do
+    describe '#find_noteable' do
       it 'returns the expected epic' do
         allow(subject).to receive(:user_group).and_return(group)
 

spec/services/ci/create_pipeline_service/pre_post_stages_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
 
 describe Ci::CreatePipelineService do
-  context '.pre/.post stages' do
+  describe '.pre/.post stages' do
     let_it_be(:user)    { create(:admin) }
     let_it_be(:project) { create(:project, :repository, creator: user) }