Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -56,7 +56,7 @@ test-job:
     coverage: '/coverage: \d+.\d+% of statements/'
   before_script:
     - apk update --cache-dir $APK_CACHE_DIR && apk upgrade --cache-dir $APK_CACHE_DIR && apk add --cache-dir $APK_CACHE_DIR $APK_PACKAGES
-    - cd hyrax && bundle config set --local path $RUBY_CACHE_DIR && bundle install --jobs 4 --retry 3 && gen install rspec_junit_formatter
+    - cd hyrax && bundle config set --local path $RUBY_CACHE_DIR && bundle install --jobs 4 --retry 3 && gem install rspec_junit_formatter
     - bundle exec rake db:setup
   script:
     - export FITS_PATH=/fits/fits-1.5.5/fits.sh