CI: fix running coqchk

.gitlab-ci.yml

@@ -8,7 +8,7 @@ buildjob:
   - 'time make -j8 TIMED=y 2>&1 | tee build-log.txt'
   - 'fgrep Axiom build-log.txt && exit 1'
   - 'cat build-log.txt  | egrep "[a-zA-Z0-9_/-]+ \(user: [0-9]" | tee build-time.txt'
-  - make verify
+  - make validate
   only:
   - master
   artifacts: