bump Coq version

.gitlab-ci.yml

@@ -27,10 +27,10 @@ variables:
 
 ## Build jobs
 
-build-coq.8.11.2:
+build-coq.8.12.0:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.11.2"
+    OPAM_PINS: "coq version 8.12.0"
     DENY_WARNINGS: "1"
   tags:
   - fp-timing

README.md

@@ -10,7 +10,7 @@ See the small ReLoC [docs/guide.md](docs/guide.md) and the Iris [ProofGuide.md](
 
 ## Building
 
-This project has been tested with Coq 8.11.2.
+This project has been tested with Coq 8.12.0.
 
 ### OPAM