Added app.digiboxx.com in password-rules

[amalgopal2015]

Overall Checklist

• I agree to the project's Developer Certificate of Origin
• The top-level JSON objects are sorted alphabetically
• There are no open pull requests for the same update

for password-rules.json

• The given rule isn't particularly standard and obvious for password managers
• Generated passwords have been tested from this rule using the Password Rules Validation Tool
• Information has been included about the website's requirements (eg. screenshots, error messages, steps during experimentation, etc.)
• The PR isn't documenting something that would be a common practice among password managers (e.g. minimal length of 6)

[amalgopal2015]

Added app.digiboxx.com in password-rules

[rmondello]

Hi @amalgopal2015! How did you come up with that list of special characters? Did the website list them, or did you try experimentally?

[kiddailey]

I took a look at this by verifying each character individually (the site highlights when the requirement has been met) and the commit is not quite correct. The site requires at least one of the 0-8 number key symbols [!@#$%^&*]. The change submitted is missing the asterisk character.

The 9 and 0 key open and close parenthesis do NOT fulfill the symbol requirement. Nor do any of the other keyboard symbols ~`-_=+[{]}|;:'",<.>/? However, any of these symbols are allowed -- they just don't fulfill the requirement.

[dmmaslenn]

I have updated this PR to include special characters mentioned on the app.digiboxx.com sign up page: