update doc and fix intelstyle repo url

Author: freibold

CHANGELOG.md

@@ -1,6 +1,14 @@
 Version History
 ---------------
 
+### Embree 4.0.1
+-   Improved performance for Tiger Lake, Comet Lake, Cannon Lake, Kaby Lake,
+    and Skylake client CPUs by using 256 bit SIMD instructions by default.
+-   Fixed broken motion blur of RTC_GEOMETRY_TYPE_ROUND_LINEAR_CURVE geometry type.
+-   Fixed bvh build retry issue for TBB 2020.3
+-   Added support for Intel® Data Center GPU Flex Series
+-   Fixed issue on systems without a SYCL platform.
+
 ### Embree 4.0.0
 -   This Embree release adds support for Intel® Arc™ GPUs through SYCL.
 -   The SYCL support of Embree is in beta phase. Current functionality, quality,