Blog: Hertz Release v0.4.0

Feature [ #289 ] feat: render support IndentedJSON. [ #304 ] feat: support errors format for the recovery middleware. [ #278 ] feat: add compile tag for json implementation. [ #239 ] feat: add retry extension for client. [ #265 ] feat: add closeNoResetBuffer method for standard network. [ #258 ] feat: errors support format. Optimize [ #295 ] optimize: ignore flushing error when connection is closed or reset. [ #322 ] optimize: modify the default log of the recovery middleware. [ #266 ] optimize(hlog): distinguish systemlogger and defaultlogger. [ #280 ] optimize: add listening log when using…