[feat] Sample Documentation update for encrypt API

[ianssoftcom]

Describe the feature

In the https://forwardemail.net/en/email-api#encrypt sample, it suggests

curl -X POST https://api.forwardemail.net/v1/encrypt \
  -d "[email protected]"

But when using regex matching for $1, it tries to use a shell variable expansion instead of as a literal $1. I would suggest using 'single quotes' instead - otherwise after a few minutes it bounces with an 'invalid "forward-email" TXT record due to an invalid regular expression email address match>'.

curl -X POST https://api.forwardemail.net/v1/encrypt -d 'input=/^(alias1|alias2)$/:[email protected]'

Checklist

• I have searched through GitHub issues for similar issues.
• I have completely read through the README and documentation.

[ianssoftcom]

Trying to emulate a DL is still failing if I use a 2nd +$1 it bounces, maybe I'm doing it wrong?

curl -X POST https://api.forwardemail.net/v1/encrypt -d 'input=/^(alias1|alias2)$/:[email protected],/^(alias1|alias2)$/:[email protected]'