Release note updates for 1.2.2

Author: kristopk

RELEASE_NOTES.md

@@ -26,9 +26,9 @@
          *     1 DDR controller implemented in the SH (always available)
          *     3 DDR controllers implemented in the CL (configurable number of implemented controllers allowed)
 
-# Release 1.2.1
+# Release 1.2.2
    *    Expanded [clock recipes](./hdk/docs/clock_recipes.csv) 
-   *    Virtual JTAG documentation updates
+   *    Reduced DCP build times by 13% (34 mins) for cl_dram_dma example by adding an option to disable virtual jtag
    *    Included encryption of .sv files for CL examples
 
 # Release 1.2.1