SSH Cert policy now allows GitHub u2s tokens to be used with `git` (#35374)

Co-authored-by: Sophie <29382425+sophietheking@users.noreply.github.com>
Co-authored-by: Matt Pollard <mattpollard@users.noreply.github.com>

data/features/ssh-cert-policy-allow-u2s-tokens.yml

@@ -0,0 +1,6 @@
+# Reference: #9840
+# Updating the "SSH Certificates Required" feature to allow GitHub Apps
+versions:
+  ghec: '*'
+  ghes: '>= 3.9'
+  ghae: '>= 3.9'

data/reusables/organizations/require-ssh-cert.md

@@ -3,6 +3,6 @@
 
    {% note %}
 
-   **Note:** When you require SSH certificates, the requirement does not apply to authorized third-party integrations or to {% data variables.product.prodname_dotcom %} features such as {% data variables.product.prodname_actions %}{% ifversion fpt or ghec %} and {% data variables.product.prodname_codespaces %}{% endif %}, which are trusted environments within the {% data variables.product.prodname_dotcom %} ecosystem.
+   **Note:** When you require SSH certificates, the requirement does not apply to authorized {% data variables.product.prodname_oauth_apps %} and {% data variables.product.prodname_github_apps %} {% ifversion ssh-cert-policy-allow-u2s-tokens %}(including user-to-server tokens){% endif %} or to {% data variables.product.prodname_dotcom %} features such as {% data variables.product.prodname_actions %}{% ifversion fpt or ghec %} and {% data variables.product.prodname_codespaces %}{% endif %}, which are trusted environments within the {% data variables.product.prodname_dotcom %} ecosystem.
 
    {% endnote %}