Entity components documentation is missing a description of avoid_damage_blocks parameter

Within the "minecraft:navigation.walk" entity component, there is a parameter "avoid_damage_blocks" that is not documented in the 1.16 entity components documentation included with the sample vanilla behavior pack. I noticed this when I found that this parameter has been added to the blaze.json. I wanted to understand it better to respond to this comment following the fix to MCPE-45469.