Add password rule and related domain for alelo.com.br

[exh-Auster]

Your password must contain:
6 to 10 characters
One uppercase character
One lowercase character
One number

Previously, meualelo.com.br was used for account creation/management and login. The latter was recently migrated to login.alelo.com; account creation and password change pages are still on meualelo.com.br. shared seems like the appropriate choice; let me now if from/to should be used instead.

Account creation (meualelo.com.br)

"New login" banner (meualelo.com.br)

“[…] A new, safer login, that will stay active for much more time […]”
“[…] the password used for accessing the Meu Alelo portal is still the same.”

Login page (login.alelo.com.br)

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)

for shared-credentials.json

• There's evidence the domains are currently related (SSL certificates, DNS entries, valid links between sites, legal documents etc.)
• If using shared, the new group serves login pages on each of the included domains, and those login pages accept accounts from the others. (For example, we wouldn't use a shared association from google.co.il to google.com, because google.co.il redirects to accounts.google.com for sign in.)
• If using from and to, the new group, the from domain(s) redirect to the to domain to log in.