fix: Return correct GPG keys url (#187)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>

src/main/kotlin/app/revanced/api/configuration/repository/GitHubBackendRepository.kt

@@ -98,7 +98,7 @@ class GitHubBackendRepository(client: HttpClient) : BackendRepository(client) {
                 gpgKeys =
                 BackendMember.GpgKeys(
                     ids = gpgKeys.map { it.keyId },
-                    url = "https://api.github.com/users/${user.login}.gpg",
+                    url = "https://github.com/${user.login}.gpg",
                 ),
             )
         }