Update subproject commit for json dependency to latest version

riccardodebenedictis · riccardodebenedictis · commit cd97b483c72b · 2025-10-29T11:54:00.000+01:00
diff --git a/extern/json b/extern/json
@@ -1 +1 @@
-Subproject commit 4a38e92bf31d57cc4b6d1a202c3d98e79f2982bb
+Subproject commit 91a22286b93d5757803f44de54fa401dc7f03b90
