lint(cspell): allow "harmonised" and "unreviewed"

Both appear in the accessibility compliance topic and are correct as
written: "harmonised" is the spelling used in the official EN 301 549
text, and "unreviewed" is a normal English word missing from the
dictionary.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: desig9stein

cspell.json

@@ -397,6 +397,8 @@
     "agentic",
     "wireframes",
     "opensource",
-    "unlayered"
+    "unlayered",
+    "harmonised",
+    "unreviewed"
   ]
 }