fix: drop PyYAML dep so verify job pytest passes

Store doc rules in bin/docs_rules.json (stdlib json). test_check_docs no
longer fails in the simulator job that only installs simulator/requirements.txt.

simulator/tests/test_check_docs.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import json
 import sys
 from pathlib import Path
 
@@ -59,15 +60,18 @@ def test_broken_link_detected(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -
     (docs / "bad.md").write_text("See [missing](missing.md).\n")
     rules = tmp_path / "bin"
     rules.mkdir()
-    (rules / "docs_rules.yaml").write_text(
-        "markdown_paths:\n  - docs/**/*.md\n"
-        "glossary:\n  file: docs/00-glossary.md\n"
-        "banned_link_targets: []\n"
-        "glossary_section_anchors: []\n"
-        "preferred_term_anchors: []\n"
-        "readability:\n  forbid_bare_see_refs: false\n"
+    (rules / "docs_rules.json").write_text(
+        json.dumps(
+            {
+                "markdown_paths": ["docs/**/*.md"],
+                "glossary": {"file": "docs/00-glossary.md"},
+                "banned_link_targets": [],
+                "glossary_section_anchors": [],
+                "preferred_term_anchors": [],
+                "readability": {"forbid_bare_see_refs": False},
+            }
+        )
     )
-    checker = SCRIPTS / "check_docs.py"
     monkeypatch.setattr("check_docs.ROOT", tmp_path)
-    monkeypatch.setattr("check_docs.RULES_PATH", rules / "docs_rules.yaml")
+    monkeypatch.setattr("check_docs.RULES_PATH", rules / "docs_rules.json")
     assert run_checks() == 1