docs: write the release notes without pronouns

The release page is public text like the site. render() said "finds
your setup", "file for your system" and "your BIOS folder". The
pronoun test now renders the notes from release.json, once more with
a pack in parts, and fails on any pronoun the script writes.

tests/test_site_pronouns.py

@@ -186,6 +186,23 @@ class SitePronouns(unittest.TestCase):
         hits = _hits(files)
         self.assertEqual(hits, [], "\n".join(hits))
 
+    def test_release_notes(self):
+        """The release page is public text too. Rendered from the committed
+        record, and once more with a pack in parts, its own paragraph."""
+        sys.path.insert(0, str(ROOT / "scripts"))
+        import release_notes
+        import release_record
+
+        record = release_record.load_record(ROOT / "release.json")
+        first = next(iter(record["packs"]))
+        parted = {**record, "packs": {**record["packs"], first: {
+            **record["packs"][first], "assets": ["a.part1of2.zip", "a.part2of2.zip"]}}}
+        platforms = str(ROOT / "platforms")
+        hits = [f"release notes:{number}: {line}"
+                for sample in (record, parted)
+                for number, line in pronouns(release_notes.render(sample, platforms, "x"))]
+        self.assertEqual(hits, [], "\n".join(hits))
+
     def test_every_allowed_quote_says_why(self):
         for quoted, reason in {**NAMES, **INSTALLER, **SOURCE}.items():
             with self.subTest(quoted=quoted):