Update extern/json subproject to latest commit

riccardodebenedictis · riccardodebenedictis · commit 3a5e6ee2595e · 2025-11-10T15:14:01.000+01:00
diff --git a/extern/json b/extern/json
@@ -1 +1 @@
-Subproject commit 0216df705d6ded4f00b468170ca5b2b3e591bcaa
+Subproject commit 27a9ee70a99b1c56dd289729cfa2e65a69638a18
