Updates to GitHub Issue and PR templates. (#12802)
Issues:
Rarely, some people answer to the add-on's question thinking to the browser's add-ons rather than NVDA's add-ons (e.g. input[type=number] not announcing value changes when incrementing value with spinbutton #12793 (comment))
Localization aspects may be ignored by some people, especially from English speaking countries
Too much checkboxes to check when opening a PR.
Co-authored-by: Sean Budd <seanbudd123@gmail.com>
Co-authored-by: Reef Turner <feerrenrut@users.noreply.github.com>
