Update external registry screenshots

docs/vendor/packaging-private-images.md

@@ -33,6 +33,8 @@ To add an external registry using the Vendor Portal:
 
    <img src="/images/add-external-registry.png" alt="/images/add-external-registry.png" width="400px"></img>
 
+   [View a larger version of this image](/images/add-external-registry.png)
+
 1. In the **Provider** drop-down, select your registry provider. 
 
 1. Complete the fields in the dialog, depending on the provider that you chose:

docs/vendor/tutorial-ecr-private-images.md

@@ -235,7 +235,9 @@ We will need the AWS Access Key ID and AWS Secret Key in the next section as the
 
 First, we must link Replicated with the registry. To do this, click on **Add External Registry** from the *Images* tab.
 
-![vendor-web-new-registry](/images/guides/kots/priv-reg-ecr-link-new.png)
+<img src="/images/add-external-registry.png" alt="/images/add-external-registry.png" width="400px"></img>
+
+[View a larger version of this image](/images/add-external-registry.png)
 
 The values for the fields are: