fix: cache joinedCircles API request

This deprecated API is only used by DAV, but doesn't benefit from the cache, which makes it VERY
heavy when you have a lot of users using calendar intensively

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/Api/v1/Circles.php

@@ -130,7 +130,7 @@ public static function joinedCircles($userId = '', $forceAll = false) {
 		$probe->includePersonalCircles($personalCircle);
 		$probe->filterHiddenCircles();
 
-		return $circleService->getCircles($probe);
+		return $circleService->getCircles($probe, true);
 	}