Update known issues for 3.0 series (#18485)

Co-authored-by: Ethan Palm <56270045+ethanpalm@users.noreply.github.com>

Author: pnsk

data/release-notes/3-0/0.yml

@@ -131,6 +131,7 @@ sections:
     - Dependency graph fails to parse `setup.py` Python manifest files, resulting in HTTP 500 errors in logs. This, combined with the duplicated logging issue, results in increased root volume utilization.
     - A race condition can cause dependency graph database migrations to appear to fail.
     - Instances with a custom timezone that were upgraded from an earlier release of GitHub Enterprise Server may have incorrect timestamps in the web UI.
+    - Old builds of Pages are not cleaned up, which could fill up the user disk (`/data/user/`).
 
   deprecations:
     - heading: Deprecation of GitHub Enterprise Server 2.19

data/release-notes/3-0/1.yml

@@ -43,6 +43,7 @@ sections:
     - 'reStructuredText (RST) rendering in the web UI may fail and instead display raw RST markup text.'
     - 'Dependency graph fails to parse `yarn.lock` Javascript manifest files, resulting in HTTP 500 errors in logs.'
     - 'Instances with a custom timezone that were upgraded from an earlier release of GitHub Enterprise Server may have incorrect timestamps in the web UI.'
+    - 'Old builds of Pages are not cleaned up, which could fill up the user disk (`/data/user/`).'
     - |
       Users may experience assets such as avatars not loading, or a failure to push/pull code. This may be caused by a PID mismatch in the `haproxy-cluster-proxy` service. To determine if you have an affected instance:
 

data/release-notes/3-0/2.yml

@@ -29,6 +29,7 @@ sections:
     - When maintenance mode is enabled, some services continue to be listed as "active processes". The services identified are expected to run during maintenance mode. If you experience this issue and are unsure, contact [GitHub Enterprise Support](https://enterprise.githubsupport.com/hc/en-us) or [GitHub Premium Support](https://premium.githubsupport.com/).
     - Jupyter Notebook rendering in the web UI may fail if the notebook includes non-ASCII UTF-8 characters.
     - reStructuredText (RST) rendering in the web UI may fail and instead display raw RST markup text.
+    - Old builds of Pages are not cleaned up, which could fill up the user disk (`/data/user/`).
     - |
       Users may experience assets such as avatars not loading, or a failure to push/pull code. This may be caused by a PID mismatch in the `haproxy-cluster-proxy` service. To determine if you have an affected instance:
 

data/release-notes/3-0/3.yml

@@ -28,6 +28,7 @@ sections:
     - When maintenance mode is enabled, some services continue to be listed as "active processes". The services identified are expected to run during maintenance mode. If you experience this issue and are unsure, contact [GitHub Enterprise Support](https://enterprise.githubsupport.com/hc/en-us) or [GitHub Premium Support](https://premium.githubsupport.com/).
     - Jupyter Notebook rendering in the web UI may fail if the notebook includes non-ASCII UTF-8 characters.
     - reStructuredText (RST) rendering in the web UI may fail and instead display raw RST markup text.
+    - Old builds of Pages are not cleaned up, which could fill up the user disk (`/data/user/`).
     - |
       Log rotation may fail to signal services to transition to new log files, leading to older log files continuing to be used, and eventual root disk space exhaustion.
       To remedy and/or prevent this issue, run the following commands in the [administrative shell](https://docs.github.com/en/enterprise-server/admin/configuration/accessing-the-administrative-shell-ssh) (SSH), or contact [GitHub Enterprise Support](https://enterprise.githubsupport.com/hc/en-us) or [GitHub Premium Support](https://premium.githubsupport.com/) for assistance: