fix(tests): add missing newline at end of reserve_test.go

Author: akrem-chabchoub

pkg/storer/internal/reserve/reserve_test.go

@@ -1162,4 +1162,4 @@ func checkChunkInIndexStore(t *testing.T, s storage.Reader, bin uint8, binId uin
 
 	checkStore(t, s, &reserve.BatchRadiusItem{Bin: bin, BatchID: ch.Stamp().BatchID(), Address: ch.Address(), StampHash: stampHash}, false)
 	checkStore(t, s, &reserve.ChunkBinItem{Bin: bin, BinID: binId, StampHash: stampHash}, false)
-}
+}