message: Mention C in README
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  -cquery is a highly-scalable, low-latency language server for C++. It is tested
  +cquery is a highly-scalable, low-latency language server for C/C++. It is tested
  and designed for large code bases like
  [Chromium](https://chromium.googlesource.com/chromium/src/). cquery provides
  accurate and fast semantic analysis without interrupting workflow.
  