chore(scripts): record the two #11671 string sites' burn-down in the prose-id baseline

The --source-hashes help text and the generated-header string no longer carry
a tracker number, so check:doc-authoring's shrink-only ledger over-pinned the
tree by those two pairs. Regenerated with its own command
(node scripts/check-doc-authoring.mjs --census-ledger); nothing else moves.

Claude-Session: https://claude.ai/code/session_local_1d2a197c-c20e-4e90-9be8-413d4d432289
Co-authored-by: Claude <noreply@anthropic.com>

Author: hotlong

scripts/doc-authoring-prose-id.baseline.json

@@ -14,9 +14,6 @@
   "#5397": 1,
   "#5673": 1
  },
- "packages/cli/src/commands/i18n/extract.ts": {
-  "#11671": 1
- },
  "packages/cli/src/commands/meta/resync.ts": {
   "#2705": 1,
   "#8692": 1
@@ -50,7 +47,6 @@
   "#3366": 1
  },
  "packages/cli/src/utils/i18n-extract.ts": {
-  "#11671": 1,
   "#12069": 1,
   "#8765": 1
  },