Adding github mobile to context passing (#54532)

Author: sunbrye

content/copilot/building-copilot-extensions/building-a-copilot-agent-for-your-copilot-extension/context-passing-for-your-agent.md

@@ -37,6 +37,7 @@ The following table shows the reference types that are passed to {% data variabl
 | {% data variables.product.prodname_vscode %} | Yes           | Yes                | Yes                 |      No              | Repository owner and branch                       |
 | {% data variables.product.prodname_vs %}      | Yes           | Yes                | Yes                 |         No           | Repository owner and branch                       |
 | {% data variables.product.prodname_dotcom_the_website %}         |    No         |        No          | Yes                 | Yes                  | Repository information and other {% data variables.product.github %} resources |
+| {% data variables.product.prodname_mobile %}      |        No     |     No            |     No              | Yes                  |             Not applicable
 
 {% endrowheaders %}
 

content/get-started/using-github/github-mobile.md

@@ -38,6 +38,7 @@ The following documentation contains more information about using {% data variab
 {% ifversion mobile-code-search %}- For more information about using {% data variables.product.prodname_dotcom %} code search on {% data variables.product.prodname_mobile %}, see [AUTOTITLE](/search-github/github-code-search/using-github-code-search#using-github-code-search-on-github-mobile).{% endif %}
 {% ifversion fpt or ghec %}- For more information on two-factor authentication using {% data variables.product.prodname_mobile %}, see [AUTOTITLE](/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-github-mobile) and [Authenticating using {% data variables.product.prodname_mobile %}](/authentication/securing-your-account-with-two-factor-authentication-2fa/accessing-github-using-two-factor-authentication#verifying-with-github-mobile). {% endif %}
 {% ifversion copilot-chat-for-mobile %}- For more information about using {% data variables.product.prodname_copilot_mobile %}, see [AUTOTITLE](/copilot/github-copilot-chat/copilot-chat-in-github-mobile/using-github-copilot-chat-in-github-mobile).{% endif %}
+{% ifversion copilot-chat-for-mobile %}- For more information about using {% data variables.product.prodname_copilot_extensions %} in {% data variables.product.prodname_mobile %}, see [Extending {% data variables.product.prodname_copilot_chat_short %} in {% data variables.product.prodname_mobile %}](/copilot/using-github-copilot/copilot-chat/asking-github-copilot-questions-in-github-mobile#extending-copilot-chat-in-github-mobile).{% endif %}
 
 ## Installing {% data variables.product.prodname_mobile %}