fix env vars markdown

Author: nhulston

layouts/shortcodes/gcr-configure-env-vars.md

@@ -8,8 +8,8 @@ For more environment variables and their function, see [Environment Variables](#
 The following command deploys the service and allows any external connection to reach it. In this example, your service listening is set to port 8080. Ensure that this port number matches the exposed port inside of your Dockerfile.
 
 ```shell
-gcloud run deploy <APP_NAME>
-  --image=gcr.io/<YOUR_PROJECT>/<APP_NAME> \
+gcloud run deploy &lt;APP_NAME&gt;
+  --image=gcr.io/&lt;YOUR_PROJECT&gt;/&lt;APP_NAME&gt; \
   --port=8080 \
   --update-env-vars=DD_API_KEY=$DD_API_KEY \
   --update-env-vars=DD_SITE=$DD_SITE \