Fix: correct /api/tags/ endpoint URL in benchmarking skill

The skill documentation stated that run benchmarks /api/tags/ but
src/paperless_benchmark/endpoints.py actually uses
/api/tags/?page_size=100000. Update the skill's Command reference
section to match the actual endpoint definition.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.claude/skills/paperless-benchmarking/SKILL.md

@@ -28,7 +28,7 @@ manage.py benchmark list-scenarios
   guardian permission grants) and `perf_admin` (superuser), plus a general
   user/group pool with realistic permission-row ratios.
 - **`run`** times the 3 built-in API endpoint benchmarks
-  (`/api/documents/`, `/api/documents/?page_size=50`, `/api/tags/`) for both
+  (`/api/documents/`, `/api/documents/?page_size=50`, `/api/tags/?page_size=100000`) for both
   `perf_target` and `perf_admin`, reporting min/median/max wall-clock and SQL
   query count. Requires `seed` to have already run — it reuses that data, it
   does not seed its own.