message: hotfix for required Embree version
diff: @@ -85,7 +85,7 @@ before you can build OSPRay you need the following prerequisites:
  Alternatively you can set CMake variable `OSPRAY_TASKING_SYSTEM` to
  `OpenMP`, `Internal`, or `Cilk` (icc only).
  - OSPRay also heavily uses [Embree](https://embree.github.io/),
  - installing version 2.15 or newer is required. If Embree is not found
  + installing version 3.1 or newer is required. If Embree is not found
  by CMake its location can be hinted with the variable `embree_DIR`.
  Depending on your Linux distribution you can install these dependencies
  