Update README.md

README.md

@@ -42,7 +42,7 @@ This data is collected by dedicated data collection workers controlled by Augur,
 
 If you're interested in collecting data with our tool, the Augur team has worked hard to develop a detailed guide to get started with our project which can be found [in our documentation](https://oss-augur.readthedocs.io/en/master/getting-started/toc.html).
 
-If you're looking to contribute to Augur's code, you can find installation instructions, development guides, architecture references (coming soon), best practices and more in our [developer documentation](https://oss-augur.readthedocs.io/en/master/development-guide/toc.html). Please know that while it's still rather sparse right now,
+If you're looking to contribute to Augur's code, you can find installation instructions, development guides, architecture references (coming soon), best practices and more in our [developer documentation](https://oss-augur.readthedocs.io/en/main/development-guide/toc.html). Please know that while it's still rather sparse right now,
 but we are actively adding to it all the time. If you get stuck, please feel free to [ask for help](https://github.com/chaoss/augur/issues/new)!
 
 ## Contributing