IVGCVSW-7485 Update operator support documentation for 23.05

 * Added CEIL and other missing operators to TfLiteParser and
   TfLite Delegate documentation.

Signed-off-by: Matthew Sloyan <matthew.sloyan@arm.com>
Change-Id: Ic30a3367a13d3b64aca2f7a8d8cc5b16616a0bcc
diff --git a/docs/05_03_delegate.dox b/docs/05_03_delegate.dox
index ffd583d..b804268 100644
--- a/docs/05_03_delegate.dox
+++ b/docs/05_03_delegate.dox
@@ -51,6 +51,8 @@
 
 - CAST
 
+- CEIL
+
 - CONCATENATION, Supported Fused Activation: RELU, RELU6, RELU_N1_TO_1, SIGMOID, TANH, NONE
 
 - CONV_2D, Supported Fused Activation: RELU, RELU6, RELU_N1_TO_1, SIGMOID, TANH, NONE
@@ -183,6 +185,8 @@
 
 - SQUEEZE
 
+- SLICE
+
 - STRIDED_SLICE
 
 - SUB