www/adguardhome: Update 0.106.3 -> 0.107.0-b.7

This fixes:

• the local distfile mismatch (bug#257766)
• the broken fronend problem (it wasn't built properly and causes the '404 page not found' error)

PR: 257766
Reported by: Michiel van Baak <michiel@vanbaak.eu>

(cherry picked from commit a6b49877f8f2b86f5787dbf1f8ec3e058ee13cd1)