Docs: fix rst formatting bug
@@ -107,7 +107,7 @@ environment in Lightkurve's `Makefile <https://github.com/lightkurve/lightkurve/
4. Add a link to the main repository to your git environment
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To be able to pull in any recent changes, we need to tell your copy of lightkurve
where the upstream repository is located:
