fix: BillAction 수정시 BillDetail 초기화 안되는 버그 수정 #55

All 114 tests pass in 3s

22 files ±0 22 suites ±0 3s ⏱️ ±0s
114 tests ±0 114 ✅ +1 0 💤 ±0 0 ❌ - 1
115 runs ±0 115 ✅ +1 0 💤 ±0 0 ❌ - 1

Results for commit 084fb5f. ± Comparison against earlier commit a432656.