Allow slashes in release tags

What does this MR do?

When a tag was created with a slash and evidence attached, the releases page throws an error. This MR encodes the tag to prevent the error from happening.

Does this MR meet the acceptance criteria?

Conformity

Availability and Testing

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

  • [-] Label as security and @ mention @gitlab-com/gl-security/appsec
  • [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
  • [-] Security reports checked/validated by a reviewer from the AppSec team

Closes #39119 (closed)

Edited by Sean Carroll