ci/build-deb: install 4.14.0

Author: Xyene

debian/rules

@@ -12,7 +12,7 @@ override_dh_clean:
 
 override_dh_auto_build:
 	opam init -y --bare
-	opam switch create -y 4.13.1-flambda --packages=ocaml-variants.4.13.1+options,ocaml-option-flambda
+	opam switch create -y 4.14.0-flambda --packages=ocaml-variants.4.14.0+options,ocaml-option-flambda
 	opam exec -- opam install -y ./magic-trace.opam --deps-only
 	opam exec -- dh_auto_build