Update README.md

Create a repo from template options have changed, with a new option to include all branches. I have tried both options -- with and without selecting this option -- and the pages rendering only works properly when all branches are selected. Directions have been updated accordingly. 

Signed-off-by: Holly <[email protected]>

README.md

@@ -91,7 +91,7 @@ Please ensure you are logged in on [GitHub](https://github.com) and have permiss
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     ```
 
-    Now, give your repository a name, choose the **visibility** (Public or Private) and click **Create repository from template**.
+    Now, give your repository a name, select **include all branches**, choose the **visibility** (Public or Private) and click **Create repository from template**.
 
     ```{figure} docs/images/github-template-create.png
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