message: add code quality badges
diff: @@ -8,6 +8,8 @@ Processor Counter Monitor (PCM) is an application programming interface (API) an
  *Github repository statistics:* ![Custom badge](https://img.shields.io/endpoint?url=https%3A%2F%2Fhetthbszh0.execute-api.us-east-2.amazonaws.com%2Fdefault%2Fpcm-clones) ![Custom badge](https://img.shields.io/endpoint?url=https%3A%2F%2F5urjfrshcd.execute-api.us-east-2.amazonaws.com%2Fdefault%2Fpcm-yesterday-clones) ![Custom badge](https://img.shields.io/endpoint?url=https%3A%2F%2Fcsqqh18g3l.execute-api.us-east-2.amazonaws.com%2Fdefault%2Fpcm-today-clones)
  +*Code quality:* [![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/opcm/pcm.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/opcm/pcm/context:cpp) [![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/opcm/pcm.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/opcm/pcm/context:python)
  +
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