Stop excerpt URL from breaking when moved to site 2 oft blog posts
requested to merge fix-url-becoming-invalid-when-adding-blogpost into 159-prepare-hacky-hour-blog-post
The excerpt of the post from 2020-02-21 contained a relative URL that broke when the preview was moved to the second page of the blog index.
This quick fix removes the link (since liquid tags do not work in excerpts).