Merge branch 'ms-sd-increase-read-timeout-for-custom-email-verification' into 'master'

Increases read timeout for Service Desk custom email verification

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/136721



Merged-by: George Koltsov <gkoltsov@gitlab.com>
Approved-by: Michał Zając <mzajac@gitlab.com>
Approved-by: George Koltsov <gkoltsov@gitlab.com>
Reviewed-by: Michał Zając <mzajac@gitlab.com>
Co-authored-by: Marc Saleiko <msaleiko@gitlab.com>