Update readme example

README.md

@@ -38,7 +38,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: cognitedata/image-scan-action@v1
         with:
-          image: <full_image_name>
+          image: <fully_qualified_image_name>
 ```
 
 You can reference an image you have built in a previous step or from a remote registry. You will have to provide credentials for private registries. Refer to the Trivy action documentation for details.  For descriptions of the other possible inputs, refer to the inputs section in `action.yml`.