Fixes github#33389 (github#34510)

Co-authored-by: Alex Nguyen <[email protected]>

content/actions/writing-workflows/choosing-what-your-workflow-does/accessing-contextual-information-about-workflow-runs.md

@@ -365,6 +365,12 @@ The contents of the `vars` context is a mapping of configuration variable names
 
 This example workflow shows how configuration variables set at the repository, environment, or organization levels are automatically available using the `vars` context.
 
+{% note %}
+
+Note: Configuration variables at the environment level are automatically available after their environment is declared by the runner.
+
+{% endnote %}
+
 {% data reusables.actions.actions-vars-context-example-usage %}
 
 ## `job` context