This commit makes minor optimizations and tweaks to the README and issue
template used in this repository:

* Replace FCAIC title with FCA title instead.
* Optimize issue template questions based on responses we typically
  receive in a Fedora context, and drop questions that rarely or never
  apply to Fedora.
* Change formatting of the issue template to improve readability.

Signed-off-by: Justin W. Flory (he/him) <jwf@redhat.com>