Add website link

Author: uellenberg

README.md

@@ -1,6 +1,6 @@
 # Upload Unit
 
-Upload Unit is a GitHub Action to upload a unit to Cratecode. It handles uploading lessons, subunits, and units, all under a single action.
+Upload Unit is a GitHub Action to upload a unit to [Cratecode](https://cratecode.com). It handles uploading lessons, subunits, and units, all under a single action.
 
 # Examples
 
@@ -16,4 +16,4 @@ steps:
           key: ${{ secrets.CRATECODE_API_KEY }}
 ```
 
-For more info on how to create lessons and units, head over to the [CLI repository](https://github.com/Cratecode/cli.git).
+For more info on how to create lessons and units, head over to the [CLI repository](https://github.com/Cratecode/cli.git).