E-mail for security issue

[REAPERSbattlecry]

The github issue categories recommend to contact nacho in case of security issues by mail.
Does it make sense to change that mail to a more general one or even to one of @theCalcaholic

[theCalcaholic]

Good find, thank you

[joshtrichards]

If someone wants their first PR... the change needs to happen in the template:

https://github.com/nextcloud/nextcloudpi/blob/master/.github/ISSUE_TEMPLATE/1_Bug_report.md?plain=1

I suggest pointing at the same resource as the GH Security Policy link:

https://github.com/nextcloud/.github/blob/master/SECURITY.md