[DS5-18 #248] Fix non-ascii character issue

[edykim]

• Added cleaning up process on chat gpt response
• Updated test cases

[github-actions[bot]]

Code Coverage

Overall Project	74.7% -0.18%	:green_apple:
Files changed	0%	:x:

File	Coverage
ServerRecipeGenerator.java	97.49%	:green_apple:
HttpHandlerBase.java	22.14% -6.87%	:x: