add goldsrc.one servers

[jonatan1024]

No description provided.

[github-actions]

Server list PR validation

Probed 7 new entries.

Gamedir	Address	Claimed	Responder	Host	Notes
cstrike	89.221.220.61:27017	48 (GoldSrc)	48 (GoldSrc)	[GoldSrc.one] HL+CS+CZ+OP4+TFC+DOD+DMC CrossPlay	✅ protocol match.
czero	89.221.220.61:27018	48 (GoldSrc)	48 (GoldSrc)	[GoldSrc.one] HL+CS+CZ+OP4+TFC+DOD+DMC CrossPlay	✅ protocol match.
dmc	89.221.220.61:27020	48 (GoldSrc)	48 (GoldSrc)	[GoldSrc.one] HL+CS+CZ+OP4+TFC+DOD+DMC CrossPlay	✅ protocol match.
dod	89.221.220.61:27022	48 (GoldSrc)	48 (GoldSrc)	[GoldSrc.one] HL+CS+CZ+OP4+TFC+DOD+DMC CrossPlay	✅ protocol match.
gearbox	89.221.220.61:27019	48 (GoldSrc)	48 (GoldSrc)	[GoldSrc.one] HL+CS+CZ+OP4+TFC+DOD+DMC CrossPlay	✅ protocol match.
tfc	89.221.220.61:27021	48 (GoldSrc)	48 (GoldSrc)	[GoldSrc.one] HL+CS+CZ+OP4+TFC+DOD+DMC CrossPlay	✅ protocol match.
valve	89.221.220.61:27016	48 (GoldSrc)	48 (GoldSrc)	[GoldSrc.one] HL+CS+CZ+OP4+TFC+DOD+DMC CrossPlay	✅ protocol match.

---

_{Probes can be flaky on the first try; the nightly publish workflow re-probes with a 48 h grace window, so a single ❌ here is not necessarily fatal. Re-push to re-run.}