Update docs/classic-ui/templates-global-variables.md

Co-authored-by: Steve Piercy <[email protected]>

Author: MrTango

docs/classic-ui/templates-global-variables.md

@@ -10,7 +10,7 @@ html_meta:
 
 For convenience Plone defines a couple of global variables often used in templates.
 
-- [portal_state](backend-global-utils-portal-state-label)
+- [`portal_state`](backend-global-utils-portal-state-label)
 - [`context_state`](backend-global-utils-context-state-label)
 - [`plone_view`](backend-global-utils-plone-view-label)
 - `icons`