"Release Post" about site blog template should get the same image handling CSS as "Blog Post" template

Created by: Joelkw

We have some image max-width and other styling (shadow) on our blog posts, defined here.

However, if we tag something both "blog, release" in the tags, it defaults to using the "release-post" css class and template.

We don't have that image handling in the release post template. This caused an issue where images in release posts were too large. (After some quick testing, removing "release" from the tag section of the post solved it, which is what led me to the class differences here. But I assume we should still keep things tagged "release" if they are release posts.)

I think we probably should make sure we treat images the same in release posts and blog posts, but a) I'm not available to go back and check on why we might have intentionally not included this image css in the release-post template, and b) I don't know why in general we have a separate release-post and blog-post templates at this detail (it feels like we should have one overall template for how we handle basic things like images, so we don't have to copy the code to two places?).