COMPMID-3424: Update Release Notes

Change-Id: I59c24900a62d8ec27f99e9fd3a5c1955b6d98783
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3250
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/docs/00_introduction.dox b/docs/00_introduction.dox
index 39b83f2..bdbb2fc 100644
--- a/docs/00_introduction.dox
+++ b/docs/00_introduction.dox
@@ -302,6 +302,13 @@
  - Removed PoolingLayerInfo constructors without Data Layout.
  - Removed CLDepthwiseConvolutionLayer3x3
  - Removed NEDepthwiseConvolutionLayerOptimized
+ - Added support for Winograd 3x3,4x4 on NEON FP16:
+     - @ref NEWinogradConvolutionLayer
+     - @ref NEWinogradLayerTransformInputKernel
+     - @ref NEWinogradLayerTransformOutputKernel
+     - @ref NEWinogradLayerTransformWeightsKernel
+ - Added CLCompileContext
+ - Added NEON GEMM kernel with 2D window support
 
 v20.02.1 Maintenance release
  - Added Android-NN build script.