[fix][#29] 키보드가 올라와있는 상태에서 취소버튼을 눌러 컨펌뷰가 떴을 때 hide keyboard

Author: dayo2n

DontForget/Sources/Presentations/Application/Creation/CreationView.swift

@@ -200,6 +200,11 @@ struct CreationView: View {
                     }
                 }
             }
+            .onChange(of: showConfirmView) { _, showed in
+                if showed {
+                    hideKeyboard()
+                }
+            }
         }
         .navigationBarHidden(true)
     }