docs(edgeai): Update README

Revise the README file to prominently highlight the addition
of support for the new edgeai OS.

Signed-off-by: Chirag Shilwant <c-shilwant@ti.com>

Author: cshilwant

README.md

@@ -66,13 +66,18 @@ Example build commands:
 
        $ make DEVFAMILY=AM62PX OS=debian
 
+ - Build EdgeAI documentation for AM62AX
+
+       $ make DEVFAMILY=AM62AX OS=edgeai
+
 ### HTML Page Output
 
 Open the index page in a web browser
 
     linux:   ./build/processor-sdk-linux-<FAMILY>/esd/docs/[version]/index.html
     android: ./build/processor-sdk-android-<FAMILY>/esd/docs/[version]/index.html
     debian:  ./build/processor-sdk-debian-<FAMILY>/esd/docs/[version]/index.html
+    edgeai:  ./build/processor-sdk-edgeai-<FAMILY>/esd/docs/[version]/index.html
 
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