Add link to dev docs

Meghan Jones · Meghan Jones · commit 559e4182c6bc · 2021-08-05T17:54:21.000-04:00
diff --git a/README.rst b/README.rst
@@ -266,3 +266,6 @@ Compatibility with GMT/Python/NumPy versions
       - >=6.0.0
       - 3.6 - 3.8
       -
+
+The unstable development documentation, which reflects the `main branch <https://github.com/GenericMappingTools/pygmt>`_
+on GitHub, can be found at https://www.pygmt.org/dev/.

Original file line number	Diff line number	Diff line change
`@@ -266,3 +266,6 @@ Compatibility with GMT/Python/NumPy versions`
`266`	`266`	`- >=6.0.0`
`267`	`267`	`- 3.6 - 3.8`
`268`	`268`	`-`
	`269`	`+`
	`270`	+The unstable development documentation, which reflects the `main branch <https://github.com/GenericMappingTools/pygmt>`_
	`271`	`+on GitHub, can be found at https://www.pygmt.org/dev/.`