Pages is enrolling in managed versioning and release-tools will take
care of creating tags. From now on it's version file should contain
only SHAs.

See epic: https://gitlab.com/groups/gitlab-com/gl-infra/-/epics/792

```
  ____ _ _   _          _       ____
 / ___(_) |_| |    __ _| |__   |  _ \ __ _  __ _  ___  ___
| |  _| | __| |   / _` | '_ \  | |_) / _` |/ _` |/ _ \/ __|
| |_| | | |_| |__| (_| | |_) | |  __/ (_| | (_| |  __/\__ \
 \____|_|\__|_____\__,_|_.__/  |_|   \__,_|\__, |\___||___/
                                           |___/
 __  __                                  _
|  \/  | __ _ _ __   __ _  __ _  ___  __| |
| |\/| |/ _` | '_ \ / _` |/ _` |/ _ \/ _` |
| |  | | (_| | | | | (_| | (_| |  __/ (_| |
|_|  |_|\__,_|_| |_|\__,_|\__, |\___|\__,_|
                          |___/
__     __            _             _
\ \   / /__ _ __ ___(_) ___  _ __ (_)_ __   __ _
 \ \ / / _ \ '__/ __| |/ _ \| '_ \| | '_ \ / _` |
  \ V /  __/ |  \__ \ | (_) | | | | | | | | (_| |
   \_/ \___|_|  |___/_|\___/|_| |_|_|_| |_|\__, |
                                           |___/
```