Readme.md doesn't load repository images if a repo is accessed from a link without '/' at the end (BB-12725)

Repository image files doesn't seem to show up correctly on readme.md file on repo overview/source section.

If repo is accessed from a link without '/' at the end, image files does not load. E.g: https://bitbucket.org/trginternational/trg.hhc.autobackup

However, if repo is accessed from a link with '/' or '/overview' at the end, image files seems to show up correctly: E.g: https://bitbucket.org/trginternational/trg.hhc.autobackup/ or https://bitbucket.org/trginternational/trg.hhc.autobackup/overview

This issue seems to only happen with images which are linked from image files inside the repo directory, images from other sources (E.g: images linked from other URL) seems to load fine