Add link to Hybrid buffer pool

Author: MikeRayMSFT

docs/sql-server/what-s-new-in-sql-server-ver15.md

@@ -35,6 +35,7 @@ Community technology preview (CTP) 2.1 is the latest public release of [!INCLUDE
   - UTF-8 collations support in [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] setup
   - Use derived table or view aliases in graph match queries
   - Improved diagnostic data for stats blocking
+  - Hybrid Buffer Pool
 - [Tools](#tools)
   - Azure Data Studio
 
@@ -285,9 +286,11 @@ Any [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] file that is placed o
 > [!NOTE]
 > For this preview release, enlightenment of files on persistent memory devices is only available on Linux. SQL Server on Windows supports persistent memory devices starting with SQL Server 2016.
 
-### Hybrid Buffer Pool (CTP 2.1)
+### Hybrid buffer pool (CTP 2.1)
 
-Hybrid Buffer Pool is a new feature of the SQL Server database engine where database pages sitting on database files placed on a persistent memory (PMEM) device will be directly accessed when required. Since PMEM devices provide very low latency for data access, the engine can forgo making a copy of the data in a "clean pages" area of the buffer pool and simply access the page directly on PMEM. Access is performed using memory mapped I/O, as is the case with enlightenment. This brings performance benefits from avoiding a copy of the page to DRAM, and from the avoidance of the I/O stack of the operating system to access the page on persistent storage. This feature is available on both SQL Server on Windows and SQL Server on Linux.   
+Hybrid buffer pool is a new feature of the SQL Server database engine where database pages sitting on database files placed on a persistent memory (PMEM) device will be directly accessed when required. Since PMEM devices provide very low latency for data access, the engine can forgo making a copy of the data in a "clean pages" area of the buffer pool and simply access the page directly on PMEM. Access is performed using memory mapped I/O, as is the case with enlightenment. This brings performance benefits from avoiding a copy of the page to DRAM, and from the avoidance of the I/O stack of the operating system to access the page on persistent storage. This feature is available on both SQL Server on Windows and SQL Server on Linux.
+
+For more information, see [Hybrid buffer pool](../database-engine/configure-windows/hybrid-buffer-pool.md)
 
 ### Support for columnstore statistics in DBCC CLONEDATABASE (CTP 2.0)