MDL-29153 Fixing typo, "Bellow" should be "Below"

mod/resource/lang/en/resource.php

@@ -80,7 +80,7 @@
 $string['printheading'] = 'Display resource name';
 $string['printheadingexplain'] = 'Display resource name above content? Some display types may not display resource name even if enabled.';
 $string['printintro'] = 'Display resource description';
-$string['printintroexplain'] = 'Display resource description bellow content? Some display types may not display description even if enabled.';
+$string['printintroexplain'] = 'Display resource description below content? Some display types may not display description even if enabled.';
 $string['resourcecontent'] = 'Files and subfolders';
 $string['resource:exportresource'] = 'Export resource';
 $string['resource:view'] = 'View resource';