fix runs-on condition for linux builds

[davidhewitt]

Change Summary

Regression from #1837, not sure why CI did not prevent

Related issue number

N/A

Checklist

• Unit tests for the changes exist
• Documentation reflects the changes where applicable
• Pydantic tests pass with this pydantic-core (except for expected changes)
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[codspeed-hq]

CodSpeed Performance Report

Merging #1839 will not alter performance

_{Comparing davidhewitt-patch-1 (135ebe6) with main (ff1aeae)}

Summary

✅ 163 untouched

[Michaelvll]

Hi @davidhewitt, it seems the 2.41.3 breaks the arm64 build -- uv pip install/pip install fails (our issue at skypilot). : )

  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745] Downloading ray (61.0MiB)
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745]   × Failed to download `pydantic-core==2.41.3`
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745]   ├─▶ Failed to extract archive:
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745]   │   pydantic_core-2.41.3-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745]   ├─▶ I/O operation failed during extraction
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745]   ╰─▶ deflate decompression error: repeated call with bad state
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745]   help: `pydantic-core` (v2.41.3) was included because `ray[default]` (v2.9.3)
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745]         depends on `pydantic` (v2.12.1) which depends on `pydantic-core`
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745]
  | 2025-10-14 01:40:28 UTC | D 10-14 01:40:28 provisioner.py:745] ===== stderr =====

[Viicos]

@Michaelvll tracking in pydantic/pydantic#12395.