[opam] temporarily limit dune upper version

- 3.13.0 has a regression that prevent build when test dune file are generated

opam

@@ -119,9 +119,9 @@ run-test: [
 ]
 
 depends: [
-  "dune" { >= "3.7.0" }
+  "dune" { >= "3.7.0" & < "3.13.0" }
   "dune-configurator"
-  "dune-site" { >= "3.7.0" }
+  "dune-site" { >= "3.7.0" & < "3.13.0" }
 
   ( "alt-ergo-free" | "alt-ergo" )
   "conf-graphviz" { post }