add missing endpoint

Author: ChristopherHX

routers/api/v1/api.go

@@ -1426,6 +1426,7 @@ func Routes() *web.Router {
 					Get(repo.GetFileContentsGet).
 					Post(bind(api.GetFilesOptions{}), repo.GetFileContentsPost) // POST method requires "write" permission, so we also support "GET" method above
 				m.Get("/signing-key.gpg", misc.SigningKey)
+				m.Get("/signing-key.pub", misc.SigningKeySSH)
 				m.Group("/topics", func() {
 					m.Combo("").Get(repo.ListTopics).
 						Put(reqToken(), reqAdmin(), bind(api.RepoTopicOptions{}), repo.UpdateTopics)