chore: update gambling from upstream sources

[github-actions]

🤖 Automated Upstream Update: gambling

This PR was automatically generated by the upstream monitoring system.

📊 Summary

• List: gambling.txt
• New domains: 186147
• Removed domains: 0
• Sources checked: 2

📡 Source Details

Source 1: gambling.txt

• URL: https://cdn.jsdelivr.net/gh/hagezi/dns-blocklists@latest/adblock/gambling.txt
• Upstream total: 514360 domains
• New domains: 186131

Sample of new domains (showing 10 of 186131):

0-casino.online
0-casino.ru
0-memocasino.com
0-p-v-r.com
0-win.zip
0000bet-0000bet-app.com
0000bet-slot.com
0000mu.casino
00067888.com
00071dd.com

Source 2: Gambling

• URL: https://raw.githubusercontent.com/ShadowWhisperer/BlockLists/refs/heads/master/Lists/Gambling
• Upstream total: 9622 domains
• New domains: 16

New domains:

4luck.net
acebet.co
covers.com
diceelite.com
graton.com
mnlottery-craft-assets-prod.s3.us-gov-west-1.amazonaws.com
polymarket-upload.s3.us-east-2.amazonaws.com
rbgcdn.com
roscasinos.com
skorbet520.com
skorbet521.com
skorbet522.com
skorbet524.com
skorbet526.com
skorbet527.com
stakewin.io

✅ Validation

• New domains are relevant to the {list_name} category
• No false positives identified
• Domains pass validation checks
• Build succeeds

🔄 Merge Policy

🔴 Manual review required - Changes exceed threshold (>100 domains)

---

This PR was created by the upstream monitoring workflow.
To disable upstream monitoring for this list, remove the upstream_sources section from config/lists.yml.