Fix Vale issues for user/project/integrations/irker.md

Hi community contributors! 👋

Do you want to work on this issue?

• If the issue is unassigned, in a comment, type @docs-hackathon I would like to work on this issue and a writer will assign it to you.

  To be fair to others, do not ask for more than three issues at a time.

• If the issue is assigned to someone already, choose another issue. Do not open a merge request for this issue if you are not assigned.

To resolve the issue

Follow these instructions to create a merge request.

• Don't submit your merge request until after the Hackathon has started.
• Try to address the issue in a single merge request.
• Try to stick to the scope of the issue. If you see other improvements that can be made in the file, open a separate merge request.
• When you create the merge request, select the Documentation merge request description template.
• In the merge request's description, add a link to this issue.
• Follow the commit message guidelines. Use three to five words for your commit message, start with message with a capital letter, and do not end it in a period. Other commit messages can cause the pipeline to fail.

Thank you again for contributing to the GitLab documentation! 🎉

Documentation issue

In the file user/project/integrations/irker.md, update the following lines to address the listed issue.

Line	Rule	Suggestion
53	gitlab.FutureTense	Instead of future tense 'will highlight', use present tense.