[7.x](backport #26469) fix(ci): use the right param type

[mergify]

This is an automatic backport of pull request #26469 done by Mergify.
Cherry-pick of f429a82 has failed:

On branch mergify/bp/7.x/pr-26469
Your branch is up to date with 'origin/7.x'.

You are currently cherry-picking commit f429a82b9.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .ci/packaging.groovy

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

---

Mergify commands and options

More conditions and actions can be found in the documentation.

You can also trigger Mergify actions by commenting on this pull request:

• @Mergifyio refresh will re-evaluate the rules
• @Mergifyio rebase will rebase this PR on its base branch
• @Mergifyio update will merge the base branch into this PR
• @Mergifyio backport <destination> will backport this PR on <destination> branch

Additionally, on Mergify dashboard you can:

• look at your merge queues
• generate the Mergify configuration with the config editor.

Finally, you can contact us on https://mergify.io/

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Build Cause: Pull request #26470 opened

• Start Time: 2021-06-24T12:36:42.544+0000

• Duration: 14 min 34 sec

• Commit: 8e52df1

Trends 🧪

❕ Flaky test report

No test was executed to be analysed.