fix indentation

Author: jaimergp

src/user/contributing.rst

@@ -94,4 +94,4 @@ Some basic writing guidelines should be kept in mind before you start contributi
 8. Avoid ambiguous titles. The title should include a clear description of the page's subject.
 9. Check your spellings and grammar.
 10. conda-forge should always be spelt in lowercase, hyphenated, and without backticks.
-  It should only be backticked when used as an identifier (e.g. the Anaconda.org channel, the Github organization, etc).
+    It should only be backticked when used as an identifier (e.g. the Anaconda.org channel, the Github organization, etc).