docs: add reusable Copilot free-access cancellation note and include in teachers/maintainers guide (#62833)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: SiaraMist <108543037+SiaraMist@users.noreply.github.com>

Author: Copilot

content/copilot/how-tos/copilot-on-github/set-up-copilot/enable-copilot/set-up-for-teachers-and-os-maintainers.md

@@ -26,6 +26,8 @@ There are two ways to qualify for free access to {% data variables.copilot.copil
 
 {% data variables.product.company_short %} reevaluates your eligibility every month.
 
+{% data reusables.copilot.free-access-cancellation-note %} For more information about managing your plan, see [AUTOTITLE](/copilot/how-tos/manage-your-account/view-and-change-your-copilot-plan).
+
 ## What if I don't qualify for free access to {% data variables.copilot.copilot_pro_short %}?
 
 If you do not meet the previous criteria, you can do one of the following:

content/copilot/how-tos/manage-your-account/view-and-change-your-copilot-plan.md

@@ -65,7 +65,7 @@ You can upgrade or downgrade your {% data variables.product.prodname_copilot_sho
 
 You can cancel your {% data variables.product.prodname_copilot_short %} plan at any time. You’ll retain access to your current features until your billing cycle ends. You will automatically be downgraded to {% data variables.copilot.copilot_free_short %} at the end of your billing cycle.
 
-If you have been granted free access to {% data variables.product.prodname_copilot_short %} as a verified student, teacher, or maintainer of a popular open source project, you won’t be able to cancel your plan. If you have access to {% data variables.product.prodname_copilot_short %} through an organization or enterprise, you will not be able to cancel your plan. In these cases, you can disable {% data variables.product.prodname_copilot_short %} in your environment. See [AUTOTITLE](/copilot/how-tos/configure-personal-settings/configure-in-ide).
+{% data reusables.copilot.free-access-cancellation-note %} If you have access to {% data variables.product.prodname_copilot_short %} through an organization or enterprise, you will not be able to cancel your plan. In these cases, you can disable {% data variables.product.prodname_copilot_short %} in your environment. See [AUTOTITLE](/copilot/how-tos/configure-personal-settings/configure-in-ide).
 
 {% data reusables.copilot.copilot-one-account-short %}
 

data/reusables/copilot/free-access-cancellation-note.md

@@ -0,0 +1 @@
+If you have been granted free access to {% data variables.product.prodname_copilot_short %} as a verified student, teacher, or maintainer of a popular open source project, you won’t be able to cancel your plan.