chore: fix docs/admin links and upgrade notice (#15043)

- Update links to /docs/admin to match the new structure
- TODO: remove the release string from the "upgrade available"
instructions link
- [x]
https://github.com/coder/coder/blob/update-upgrade-config-links/cli/server.go#L646


![2024-10-11_11-35-40](https://github.com/user-attachments/assets/fd95e821-d5ad-4c91-a38a-066046c7072c)

---------

Co-authored-by: EdwardAngert <17991901+EdwardAngert@users.noreply.github.com>

cli/testdata/coder_templates_create_--help.golden

@@ -55,7 +55,7 @@ OPTIONS:
           Requires workspace builds to use the active template version. This
           setting does not apply to template admins. This is an enterprise-only
           feature. See
-          https://coder.com/docs/templates/general-settings#require-automatic-updates-enterprise
+          https://coder.com/docs/admin/templates/managing-templates#require-automatic-updates-enterprise
           for more details.
 
       --var string-array

cli/testdata/coder_templates_edit_--help.golden

@@ -87,7 +87,7 @@ OPTIONS:
           Requires workspace builds to use the active template version. This
           setting does not apply to template admins. This is an enterprise-only
           feature. See
-          https://coder.com/docs/templates/general-settings#require-automatic-updates-enterprise
+          https://coder.com/docs/admin/templates/managing-templates#require-automatic-updates-enterprise
           for more details.
 
   -y, --yes bool