Introducing oneTBB Guru on Gurubase.io (#1566)

Signed-off-by: Kursat Aktas <kursat.ce@gmail.com>
Co-authored-by: Mike Voss <michaelj.voss@intel.com>

README.md

@@ -3,6 +3,7 @@
 [![Join the community on GitHub Discussions](https://badgen.net/badge/join%20the%20discussion/on%20github/blue?icon=github)](https://github.com/uxlfoundation/oneTBB/discussions)
 [![OpenSSF Best Practices](https://www.bestpractices.dev/projects/9125/badge)](https://www.bestpractices.dev/projects/9125)
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/uxlfoundation/oneTBB/badge)](https://securityscorecards.dev/viewer/?uri=github.com/uxlfoundation/oneTBB)
+[![Gurubase](https://img.shields.io/badge/Gurubase-Ask%20oneTBB%20Guru-006BFF)](https://gurubase.io/g/onetbb)
 
 oneTBB is a flexible C++ library that simplifies the work of adding parallelism
 to complex applications, even if you are not a threading expert.