Update conan installation snippet to use project url

What does this MR do?

With the addition of Conan packages scoped to project-level, it makes sense to update the instructions snippet in the package detail view to show the project-level remote rather than the instance-level remote.

But why 🤔 ?

Users can upload many packages to a project, using either instance-level or project-level remotes. However, for a given project, the project-level remote will allow a user to see and work with all packages belonging to that project, whereas the instance-level remote will only allow a user to work with the instance-level packages (the project-level packages are not accessible through the instance-level remote).

By updating the snippet to the proejct-level remote, we ensure that the user is able to fully access the package they are viewing using the listed remote.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

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