distribution: Change from blame to rendered URI for image-index

[wking]

We only need blame views when the Markdown does not provide a specific-enough anchor, and this is a link to the whole file.

Fixes the issue raised be @stevvooe here.

[dmcgowan]

LGTM

[wking]

@caniszczyk, did you want to merge this before the distribution vote hits its stride?

[stevvooe]

LGTM