Merge pull request ocaml#21972 from kit-ty-kate/fix-13

vecosek-scene is not compatible with yojson 2.0.0

Author: kit-ty-kate

packages/vecosek-scene/vecosek-scene.0.0.0/opam

@@ -16,8 +16,8 @@ depends: [
   "jbuilder" {>= "1.0+beta20"}
   "nonstd"
   "sosa"
-  "yojson"
-  "atdgen"
+  "yojson" {< "2.0.0"}
+  "atdgen" {< "2.10.0"}
 ]
 synopsis: ""
 description: """