Capitalise MadeToShare hashtag

Problem/Motivation

Hashtags are more accessible when the individual words are capitalised: https://www.boia.org/blog/make-your-hashtags-accessible

Proposed resolution

Capitalise the individual words of the hashtag. This improves readability for sighted users and ensures proper
pronounciation for screenreaders. An all-around accessibility win.

Tagged as bugfix as per our accessibility considerations.

Remaining tasks

User interface changes

API changes

Data model changes