ASAP-133 feat: 편지 수정 api 추가

[tlarbals824]

No description provided.

[github-actions]

Code Coverage Report

Overall Project	93.64% -0.2%	🍏
Files changed	95.15%	🍏

File	Coverage
ReceiverLetterMapper.kt	100%	🍏
LetterController.kt	100%	🍏
LetterCommandService.kt	100%	🍏
SpaceLetter.kt	100%	🍏
SpaceLetterController.kt	98.55% -1.45%	🍏
SendLetterMapper.kt	98.23%	🍏
ExceptionHandleFilter.kt	97.84% -2.16%	🍏
IndependentLetter.kt	97.63%	🍏
UpdateLetterUsecase.kt	96.94% -3.06%	🍏
LetterContent.kt	87.04% -7.41%	🍏
SenderInfo.kt	83.72% -9.3%	🍏
BusinessException.kt	65.63% -4.69%	🍏
SecuredInterceptorHandler.kt	0%	❌

[sonarcloud]

Quality Gate passed

Issues
9 New issues
0 Accepted issues

Measures
0 Security Hotspots
53.8% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud