NEWS: Updated 1.15.0-rc4 section.

Author: rakhmets

NEWS

@@ -11,11 +11,13 @@
 ### Features:
 ### Bugfixes:
 
-## 1.15.0-rc4 (August 22, 2023)
+## 1.15.0-rc4 (August 30, 2023)
 ### Bugfixes:
 #### RDMA CORE (IB, ROCE, etc.)
 * Fixed dma-buf based memory region registration
 * Fixed memory handle data corruption when PCIe relaxed ordering is enabled
+#### UCS
+* Fixed lane selection, adding bandwidth estimation for Sapphire Rapids family
 
 ## 1.15.0-rc3 (August 8, 2023)
 ### Bugfixes: