Remove Ubuntu 20.04 from supported GitHub Actions runners list (#37760)

Co-authored-by: Sharra-writes <[email protected]>

Author: Sebastian-Webster

data/reusables/actions/supported-github-runners.md

@@ -23,8 +23,7 @@ For public repositories, jobs using the workflow labels shown in the table below
       <td>
         <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md">ubuntu-latest</a></code>,
         <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md">ubuntu-24.04</a></code>,
-        <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md">ubuntu-22.04</a></code>,
-        <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2004-Readme.md">ubuntu-20.04</a></code>
+        <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md">ubuntu-22.04</a></code>
       </td>
     </tr>
     <tr>
@@ -114,8 +113,7 @@ For {% ifversion ghec %}internal and{% endif %} private repositories, jobs using
       <td>
         <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md">ubuntu-latest</a></code>,
         <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md">ubuntu-24.04</a></code>,
-        <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md">ubuntu-22.04</a></code>,
-        <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2004-Readme.md">ubuntu-20.04</a></code>
+        <code><a href="https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md">ubuntu-22.04</a></code>
       </td>
     </tr>
     <tr>