Normalise name of oclaunch pin for CI

 + coherent with the name in opam file

gitlab-ci.sh

@@ -29,7 +29,7 @@ opam install ocamlfind
 opam install alcotest oUnit
 
 # Installing dependancies and testing installation
-opam pin add oclaunch-ci .
+opam pin add oclaunch .
 echo "============"
 
 # Run test if OC_NOTEST is false