Fix lifetime warning by explicitly inferring from context

[byfnoel]

Look below for context:

--> src/repositories/updater.rs:311:36
     |
     | pub(crate) fn repository_name(url: &str) -> Option<RepositoryName> {
     |                                    ^^^^            -------------- the same lifetime is hidden here
     |                                    |
     |                                    the lifetime is elided here
     |
     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing

[GuillaumeGomez]

Thanks!

[byfnoel]

Thank you for merging this.