Emphasize to read documentation before doxygen

README.md

@@ -37,7 +37,8 @@ It includes:
 * Overview of concepts and ideas
 * Descriptions of LLAMA's constructs
 
-An API documentation is generated by Doxygen from the C++ source and is uploaded to your [GitHub Page](https://alpaka-group.github.io/llama/).
+An API documentation is generated by [Doxygen](https://alpaka-group.github.io/llama/) from the C++ source.
+Please read the documentation on Read the Docs first!
 We published a paper on LLAMA to the [Wiley Digital Library](https://doi.org/10.1002/spe.3077).
 We gave a talk on LLAMA at CERN's Compute Accelerator Forum on 2021-05-12.
 The video recording (starting at 40:00) and slides are available here on [CERN's Indico](https://indico.cern.ch/event/975010/).