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: 56104
• 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: 390859 domains
• New domains: 56102

Sample of new domains (showing 10 of 56102):

00295.casino
0066betsi.com
0069sx.casino
006o5.casino
0077betss.com
007betcasinoka.com
007gamebet1.com
007slots.pro
0088bet48.com
009casino.host

Source 2: Gambling

• URL: https://raw.githubusercontent.com/ShadowWhisperer/BlockLists/refs/heads/master/Lists/Gambling
• Upstream total: 9600 domains
• New domains: 2

New domains:

acebet.co
roscasinos.com

✅ 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.