MLECO-2400: Test GNU toolchain 10.3-2021.07

Change-Id: Ifd6d3d72abb1e8ce058e612295d01a148962627e
diff --git a/scripts/cmake/cmsis-dsp.cmake b/scripts/cmake/cmsis-dsp.cmake
index bb26b69..ab2b0f9 100644
--- a/scripts/cmake/cmsis-dsp.cmake
+++ b/scripts/cmake/cmsis-dsp.cmake
@@ -64,7 +64,7 @@
 
     # There is a known issue with -O0 optimisation option that affects
     # FFT functions from CMSIS-DSP when compiling with Arm GNU embedded
-    # toolchain version 10.2.1
+    # toolchain version 10.2.1 or 10.3-2021.07
     if (CMAKE_BUILD_TYPE STREQUAL Debug)
         message(WARNING "There are known issues with CMSIS-DSP builds using "
                         "MVE extension without optimisation. Forcing -O3 "