IVGCVSW-6166 Add Support for Conv3d to TFLite Delegate

 * Conv3d is only correctly supported for external delegates
   from TF v2.6, as there was a breaking bug in v2.5.

Signed-off-by: Matthew Sloyan <matthew.sloyan@arm.com>
Change-Id: Ib7941307f4c7b0d3dbb7deaa5a90aceb63c1162f
diff --git a/docs/01_03_delegate.dox b/docs/01_03_delegate.dox
index 04f216a..2d30e65 100644
--- a/docs/01_03_delegate.dox
+++ b/docs/01_03_delegate.dox
@@ -51,6 +51,8 @@
 
 - CONV_2D, Supported Fused Activation: RELU , RELU6 , TANH, NONE
 
+- CONV_3D, Supported Fused Activation: RELU , RELU6 , TANH, NONE
+
 - DEPTH_TO_SPACE
 
 - DEPTHWISE_CONV_2D, Supported Fused Activation: RELU , RELU6 , TANH, NONE