Auto-building 4 new Unity database(s)

The weekly detect workflow found new Unity versions without databases.
Builds have been triggered on the buildmac runner.

**New versions:**
- `6000.0.79f1`
- `6000.2.15f1`
- `6000.4.12f1`
- `6000.5.4f1`

**What to check after builds complete:**
- Confirm updated `.db` files in the `db-v1` release
- Spot-check record counts in the build logs