Attempt to fix Coq CI

Coq CI is broken since a few days because it compiles the wrong version of iris, obtained from the OPAM file here in iris-example. Merging this should fix it.

coq-iris-examples.opam

@@ -8,7 +8,7 @@ dev-repo: "git+https://gitlab.mpi-sws.org/iris/examples.git"
 synopsis: "A collection of case studies for Iris -- not meant to be used as a dependency of anything"
 
 depends: [
-  "coq-iris-heap-lang" { (= "dev.2023-03-09.0.f91e8eab") | (= "dev") }
+  "coq-iris-heap-lang" { (= "dev.2023-03-10.0.45e5a052") | (= "dev") }
   "coq-autosubst" { = "dev" }
 ]