Fixing error in pyarmnn generate_docs.py
Fixing error in pyarmnn generate_docs.py

Signed-off-by: Nikhil Raj <70dde441576cd8b053dd4c3a595f3f0b9c7a63a3@arm.com>
Change-Id: Ic352c48dfe04c6cc5a2b201bf71950866be6b2fe

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn