Update Fizzie to cater for changes in 10.6.0-rc.1

[bobbingwide]

See the following:
Menu items displayed incorrectly again

#26 (comment)

Also there are changes to a couple of blocks

Was	Now
post-tags	post-terms post_tag variation
post-hierarchical-terms	post-terms category variation

Code changes necessary are:
From

<!-- wp:post-tags /-->

<!-- wp:post-hierarchical-terms {"term":"category"} /-->

to

<!-- wp:post-terms {"term":"post_tag"} /-->

<!-- wp:post-terms {"term":"category"} /--> 

[bobbingwide]

delivered in 0.6.1