Added GitHub Token expiration information

Author: dihydroJenoxide

content/actions/security-guides/automatic-token-authentication.md

@@ -23,7 +23,7 @@ At the start of each workflow run, {% data variables.product.prodname_dotcom %}
 
 When you enable {% data variables.product.prodname_actions %}, {% data variables.product.prodname_dotcom %} installs a {% data variables.product.prodname_github_app %} on your repository. The `GITHUB_TOKEN` secret is a {% data variables.product.prodname_github_app %} installation access token. You can use the installation access token to authenticate on behalf of the {% data variables.product.prodname_github_app %} installed on your repository. The token's permissions are limited to the repository that contains your workflow. For more information, see "[Permissions for the `GITHUB_TOKEN`](#permissions-for-the-github_token)."
 
-Before each job begins, {% data variables.product.prodname_dotcom %} fetches an installation access token for the job. The token expires when the job is finished.
+Before each job begins, {% data variables.product.prodname_dotcom %} fetches an installation access token for the job. {% data reusables.actions.github-token-expiration %}
 
 The token is also available in the `github.token` context. For more information, see "[Contexts](/actions/learn-github-actions/contexts#github-context)."
 

content/actions/using-workflows/workflow-syntax-for-github-actions.md

@@ -716,6 +716,12 @@ The maximum number of minutes to let a job run before {% data variables.product.
 
 If the timeout exceeds the job execution time limit for the runner, the job will be canceled when the execution time limit is met instead. For more information about job execution time limits, see {% ifversion fpt or ghec or ghes %}"[Usage limits and billing](/actions/reference/usage-limits-billing-and-administration#usage-limits)" for {% data variables.product.prodname_dotcom %}-hosted runners and {% endif %}"[About self-hosted runners](/actions/hosting-your-own-runners/about-self-hosted-runners/#usage-limits){% ifversion fpt or ghec or ghes %}" for self-hosted runner usage limits.{% elsif ghae %}."{% endif %}
 
+{% note %}
+
+**Note:** {% data reusables.actions.github-token-expiration %} For self-hosted runners, the token may be the limiting factor if the job timeout is greater than 24 hours. 
+
+{% endnote %}
+
 ## `jobs.<job_id>.strategy`
 
 {% data reusables.actions.jobs.section-using-a-build-matrix-for-your-jobs-strategy %}

data/reusables/actions/github-token-expiration.md

@@ -0,0 +1 @@
+The `GITHUB_TOKEN` expires when a job finishes or after 24 hours.