Add missing domains for self-hosted runners

sub-domains for *.actions.githubusercontent.com (artifactcache.actions.githubusercontent.com, pipelines.actions.githubusercontent.com) are CNAME records instead of A pointing to star-actions-githubusercontent-com.l-0007.l-msedge.net which further points to l-0007.l-msedge.net as a CNAME record. We have our infrastructure hosted on AWS and are using DNS firewall for restricting external traffic. That being said, it was quite hard to find the reason but I finally found it and once I added the mentioned two sub-domains self-hosted runners were able to pick up jobs

Author: paliwalvimal

content/actions/hosting-your-own-runners/about-self-hosted-runners.md

@@ -142,6 +142,8 @@ codeload.github.com
 pkg-cache.githubusercontent.com
 pkg-containers.githubusercontent.com
 pkg-containers-az.githubusercontent.com
+star-actions-githubusercontent-com.l-0007.l-msedge.net.
+l-0007.l-msedge.net.
 ```
 
 If you use an IP address allow list for your {% data variables.product.prodname_dotcom %} organization or enterprise account, you must add your self-hosted runner's IP address to the allow list. For more information, see "[Managing allowed IP addresses for your organization](/organizations/keeping-your-organization-secure/managing-allowed-ip-addresses-for-your-organization#using-github-actions-with-an-ip-allow-list)" or "[Enforcing security settings in your enterprise account](/github/setting-up-and-managing-your-enterprise/enforcing-security-settings-in-your-enterprise-account#using-github-actions-with-an-ip-allow-list)".