Use Time.zone.at method

- Revert change in spec

app/services/resource_events/base_synthetic_notes_builder_service.rb

@@ -26,7 +26,7 @@ module ResourceEvents
     def since_fetch_at(events)
       return events unless params[:last_fetched_at].present?
 
-      last_fetched_at = Time.at(params.fetch(:last_fetched_at).to_i)
+      last_fetched_at = Time.zone.at(params.fetch(:last_fetched_at).to_i)
       events.created_after(last_fetched_at - NotesFinder::FETCH_OVERLAP)
     end
 

spec/services/repository_archive_clean_up_service_spec.rb

@@ -110,6 +110,8 @@ describe RepositoryArchiveCleanUpService do
 
   def create_temporary_files(dir, extensions, mtime)
     FileUtils.mkdir_p(dir)
-    FileUtils.touch(extensions.map { |ext| File.join(dir, "sample.#{ext}") }, mtime: Time.current - mtime)
+    # rubocop: disable Rails/TimeZone
+    FileUtils.touch(extensions.map { |ext| File.join(dir, "sample.#{ext}") }, mtime: Time.now - mtime)
+    # rubocop: enable Rails/TimeZone
   end
 end