Include runner group limits in ARC documentation (#56188)

Author: corycalahan

content/actions/hosting-your-own-runners/managing-self-hosted-runners-with-actions-runner-controller/troubleshooting-actions-runner-controller-errors.md

@@ -150,6 +150,10 @@ To fix this, you can do one of the following things.
 
 A `401 Unauthorized` error when attempting to obtain an access token for a {% data variables.product.prodname_github_app %} could be a result of a Network Time Protocol (NTP) drift. Ensure that your Kubernetes system is accurately syncing with an NTP server and that there isn't a significant time drift. There is more leeway if your system time is behind {% data variables.product.github %}'s time, but if the environment is more than a few seconds ahead, 401 errors will occur when using {% data variables.product.prodname_github_app %}.
 
+## Runner group limits
+
+{% data reusables.actions.self-hosted-runner-group-limit %}
+
 ## Legal notice
 
 {% data reusables.actions.actions-runner-controller-legal-notice %}

content/actions/hosting-your-own-runners/managing-self-hosted-runners/usage-limits-for-self-hosted-runners.md

@@ -15,4 +15,4 @@ type: overview
 {% data reusables.actions.usage-api-requests %}
 * **Job matrix** - {% data reusables.actions.usage-matrix-limits %}
 {% data reusables.actions.usage-workflow-queue-limits %}
-* **Registering self-hosted runners** - You can have a maximum of 10,000 self-hosted runners in one runner group. If this limit is reached, adding a new runner will not be possible.
+* **Registering self-hosted runners** - {% data reusables.actions.self-hosted-runner-group-limit %}

data/reusables/actions/self-hosted-runner-group-limit.md

@@ -0,0 +1 @@
+You can have a maximum of 10,000 self-hosted runners in one runner group. If this limit is reached, adding a new runner will not be possible.