Fix BuildTraceChunkFlushToDbWorker name

app/models/ci/build_trace_chunk.rb

@@ -99,7 +99,7 @@ module Ci
     def schedule_to_db
       return if db?
 
-      BuildTraceChunkFlushToDBWorker.perform_async(id)
+      BuildTraceChunkFlushToDbWorker.perform_async(id)
     end
 
     def fullfilled?

app/workers/build_trace_chunk_flush_to_db_worker.rb

@@ -1,4 +1,4 @@
-class BuildTraceChunkFlushToDBWorker
+class BuildTraceChunkFlushToDbWorker
   include ApplicationWorker
   include PipelineQueue
 

spec/models/ci/build_trace_chunk_spec.rb

@@ -75,7 +75,7 @@ describe Ci::BuildTraceChunk, :clean_gitlab_redis_shared_state do
         let(:value) { 'a' * described_class::CHUNK_SIZE }
 
         it 'schedules stashing data' do
-          expect(BuildTraceChunkFlushToDBWorker).to receive(:perform_async).once
+          expect(BuildTraceChunkFlushToDbWorker).to receive(:perform_async).once
 
           subject
         end
@@ -112,7 +112,7 @@ describe Ci::BuildTraceChunk, :clean_gitlab_redis_shared_state do
 
       context 'when fullfilled chunk size' do
         it 'does not schedule stashing data' do
-          expect(BuildTraceChunkFlushToDBWorker).not_to receive(:perform_async)
+          expect(BuildTraceChunkFlushToDbWorker).not_to receive(:perform_async)
 
           subject
         end