Travis: Update misleading comment

.travis.yml

@@ -187,7 +187,7 @@ matrix:
       after_success:
         # If this build is NOT triggered by a pull request; AND got triggered by either a tag OR push to master
         # and the following environment variables are set:
-        #   CONAN_UPLOAD - a reference to the Conan repository e.g. https://bintray.com/google/conan
+        #   CONAN_UPLOAD - a reference to the Conan repository e.g. https://api.bintray.com/google/conan
         #   CONAN_LOGIN_USERNAME - user for the upload e.g. upload_bot_username
         #   CONAN_PASSWORD - password for the CONAN_LOGIN_USERNAME; for Bintray this is the API key
         # then upload the new recipe version to the Conan repository.