Fix small typos on specs

spec/lib/gitlab/geo/log_cursor/daemon_spec.rb

@@ -108,7 +108,7 @@ describe Gitlab::Geo::LogCursor::Daemon do
       end
     end
 
-    context 'when node have namespace restrictions' do
+    context 'when node has namespace restrictions' do
       let(:geo_node) { create(:geo_node, :current) }
       let(:group_1) { create(:group) }
       let(:group_2) { create(:group) }

spec/workers/geo/file_download_dispatch_worker_spec.rb

@@ -75,7 +75,7 @@ describe Geo::FileDownloadDispatchWorker do
       end
     end
 
-    context 'when node have namespace restrictions' do
+    context 'when node has namespace restrictions' do
       let(:group_1)    { create(:group) }
       let!(:project_1) { create(:empty_project, group: group_1) }
       let!(:project_2) { create(:empty_project) }

spec/workers/geo/repositories_clean_up_worker_spec.rb

@@ -7,7 +7,7 @@ describe Geo::RepositoriesCleanUpWorker do
   let!(:project_2) { create(:empty_project) }
 
   describe '#perform' do
-    context 'when node have namespace restrictions' do
+    context 'when node has namespace restrictions' do
       it 'performs GeoRepositoryDestroyWorker for each project that do not belong to selected namespaces to replicate' do
         geo_node.update_attribute(:namespaces, [group])
 

spec/workers/geo/repository_sync_worker_spec.rb

@@ -64,7 +64,7 @@ describe Geo::RepositorySyncWorker do
       subject.perform
     end
 
-    context 'when node have namespace restrictions' do
+    context 'when node has namespace restrictions' do
       before do
         secondary.update_attribute(:namespaces, [group])
       end