📝 Update instructions

Author: Michelle Tilley

Diff for: README.md

@@ -25,6 +25,12 @@ Once cloned correctly, you should have additional subfolders inside the clone re
 
 A day or two before the workshop, please take a moment to pull down the latest changes so everything is up to date. From inside the cloned repository, run:
 
+```
+git pull
+```
+
+and then
+
 ```
 git submodule update --init --recursive
 ```