Update .gitlab-ci.yml

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Name Stage Failure
deploy Test There is an unknown failure, please try again
[ERROR] Refer to the generated Javadoc files in '/builds/xt9634/ProofScriptParser/target/apidocs' dir.
[ERROR] -> [Help 1]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
ERROR: Job failed: exit code 1