docs: fix HttpResponseException Markup (#829)

docs/http-transport.md

@@ -86,7 +86,7 @@ that also, use `Level.ALL` instead of `Level.CONFIG`.
 ## Handling HTTP error responses
 
 When an HTTP error response (an HTTP status code of 300 or higher) is received,
-[`HttpRequest.execute()`][request-execute] throws an [`HttpResponseException`][response-exeception].
+[`HttpRequest.execute()`][request-execute] throws an [`HttpResponseException`][response-exception].
 Here's an example usage:
 
 ```java
@@ -133,4 +133,4 @@ HttpRequestFactory requestFactory = transport.createRequestFactory(new MyInitial
 [file-handler]: https://docs.oracle.com/javase/7/docs/api/java/util/logging/FileHandler.html
 [request-execute]: https://googleapis.dev/java/google-http-client/latest/com/google/api/client/http/HttpRequest.html#execute--
 [response-exception]: https://googleapis.dev/java/google-http-client/latest/index.html?com/google/api/client/http/HttpResponseException.html
-[http-unsuccessful-response-handler]: https://googleapis.dev/java/google-http-client/latest/index.html?com/google/api/client/http/HttpUnsuccessfulResponseHandler.html
+[http-unsuccessful-response-handler]: https://googleapis.dev/java/google-http-client/latest/index.html?com/google/api/client/http/HttpUnsuccessfulResponseHandler.html