fix(ci): repair corrupted rsr-antipattern.yml from #17 (#18)

PR #17 was auto-merged but landed corrupted YAML — the original sweep built its canonical via `gh api --jq '.content'` piped through PowerShell, but `gh` line-wraps base64 in the terminal pipe, so each chunk was decoded separately and the resulting file has mid-word line breaks (`# SPDX-License-Id\nentifier:`, `name: RSR A\nnti-Pattern`, etc.). GitHub Actions can't parse it — the workflow completes in 0 seconds with no jobs.

This PR replaces the file with the correct content, built via raw byte download (`Accept: application/vnd.github.raw`) and `[System.IO.File]::WriteAllBytes` so no pipe touches the bytes. Round-trip byte-verified against canonical (8553 bytes, 1 PYEOF, no orphan BUILTIN_GLOBS, DIR_NAMES_ALLOWED preserved). Same fix as hyperpolymath/stapeln#34.

Author: hyperpolymath