text: Title: [BUG] Not Finding Blueprint routes when using url_prefix
  Body: ## Not Finding Blueprint routes when using url_prefix
  
  It seems that the lib doesn't load Blueprints routes if the Blueprint uses a prefix, I've opened a PR explaining the issue and the possible solution in depth here: https://github.com/0b01001001/spectree/pull/193#issue-1107430572
  