Fix markdown lint error "[no-literal-urls] Don’t use literal URLs wit…

…hout angle brackets" (#203)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,7 +1,7 @@
 ## CSL Locales Pull Request Template
 
 You're about to create a pull request to the CSL locales repository.
-If you haven't done so already, see http://docs.citationstyles.org/en/stable/translating-locale-files.html for instructions on how to translate CSL locale files, and https://github.com/citation-style-language/styles/blob/master/CONTRIBUTING.md on how to submit your changes.
+If you haven't done so already, see <http://docs.citationstyles.org/en/stable/translating-locale-files.html> for instructions on how to translate CSL locale files, and <https://github.com/citation-style-language/styles/blob/master/CONTRIBUTING.md> on how to submit your changes.
 In addition, please fill out the pull request template below.
 
 ### Description