Update format of version passed to changelog API

What does this MR do and why?

Describe in detail what your merge request does and why.

Content

The product's Changelog API has been changed to accept versions in different format. See gitlab-com/gl-infra/production#17590 (closed).

Update the format of version we send to the API.

Tested by calling the API on a custom branch on gitlab-org/gitlab and gitlab-org/gitaly:

• gitlab@46969f5d (called API with version as v16.9.0-ee)
• gitaly@c8d5a3a3 (called API with version as v16.9.0)

Author Check-list

• Has documentation been updated?