Add dependabot-actions.githubapp.com to networking requirements (#52902)

Co-authored-by: mc <42146119+mchammer01@users.noreply.github.com>

data/reusables/actions/runner-essential-communications.md

@@ -49,3 +49,12 @@ ghcr.io
 github-cloud.githubusercontent.com
 github-cloud.s3.amazonaws.com
 ```
+
+{% ifversion fpt or ghec %}
+**Needed for jobs for {% data variables.product.prodname_dependabot_updates %}**
+
+```shell copy
+dependabot-actions.githubapp.com
+```
+
+{% endif %}