MDL-53773 tool_lp: Missing validate_context call in external function

Just sneaking that in as I noticed it while fixing RTL.

admin/tool/lp/classes/external.php

@@ -279,6 +279,7 @@ class external extends external_api {
 
         $competency = api::read_competency($params['competencyid']);
         $framework = api::read_framework($competency->get_competencyframeworkid());
+        self::validate_context($framework->get_context());
         $renderable = new output\competency_summary($competency, $framework, $params['includerelated'], $params['includecourses']);
         $renderer = $PAGE->get_renderer('tool_lp');