CMSIS-NN : Update history in pdsc file

History is updated to show that SVDF is
optimized for Helium tech as well.
diff --git a/ARM.CMSIS.pdsc b/ARM.CMSIS.pdsc
index 9bf39e1..fcdc2a1 100644
--- a/ARM.CMSIS.pdsc
+++ b/ARM.CMSIS.pdsc
@@ -26,7 +26,7 @@
        - RTX5: Purged pre-built libs from Git
       CMSIS-NN: 3.0.0 (see revision history for details including version 2.0.0)
        - Major interface change for functions compatible with TensorFlow Lite for Microcontroller
-       - Added optimization for SVDF kernel - DSP extension only
+       - Added optimization for SVDF kernel
        - Improved MVE performance for fully Connected and max pool operator
        - NULL bias support for fully connected operator in non-MVE case(Can affect performance)
        - Expanded existing unit test suite along with support for FVP