Adding a section for support architectures for self-hosted runners

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

@@ -63,7 +63,7 @@ There are some limits on {% data variables.product.prodname_actions %} usage whe
 {% data reusables.github-actions.usage-api-requests %}
 - **Job matrix** - {% data reusables.github-actions.usage-matrix-limits %}
 
-### Supported operating systems for self-hosted runners
+### Supported architectures and operating systems for self-hosted runners
 
 The following operating systems are supported for the self-hosted runner application.
 
@@ -94,6 +94,13 @@ The following operating systems are supported for the self-hosted runner applica
 
 {% if enterpriseServerVersions contains currentVersion %}
 
+#### Architectures
+
+- x64
+- x86
+- ARM64
+- ARM32
+
 ### Supported actions on self-hosted runners
 
 Some extra configuration might be required to use actions from {% data variables.product.prodname_dotcom_the_website %} with {% data variables.product.prodname_ghe_server %}, or to use the `actions/setup-LANGUAGE` actions with self-hosted runners that do not have internet access. For more information, see "[Managing access to actions from {% data variables.product.prodname_dotcom_the_website %}](/enterprise/admin/github-actions/managing-access-to-actions-from-githubcom)" and contact your {% data variables.product.prodname_enterprise %} site administrator.