Media: Adjust alt text info link text.

Previous messaging of this link was confusing given it went to an external source. This change describes more accurately that it will perform the action of taking you to the resource.

Props karmatosed, joedolson, melchoyce, hellofromTonya, afercia, sabernhardt, antpb.
Fixes #48939.



git-svn-id: https://develop.svn.wordpress.org/trunk@52033 602fd350-edb4-49c9-b593-d223f7449a82

Author: antpb

src/wp-admin/includes/media.php

@@ -3228,7 +3228,7 @@ function edit_form_image_editor( $post ) {
 
 		printf(
 			/* translators: 1: Link to tutorial, 2: Additional link attributes, 3: Accessibility text. */
-			__( '<a href="%1$s" %2$s>Describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
+			__( '<a href="%1$s" %2$s>Learn how to describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
 			esc_url( 'https://www.w3.org/WAI/tutorials/images/decision-tree' ),
 			'target="_blank" rel="noopener"',
 			sprintf(

src/wp-includes/media-template.php

@@ -158,7 +158,7 @@ function wp_print_media_templates() {
 
 	$alt_text_description = sprintf(
 		/* translators: 1: Link to tutorial, 2: Additional link attributes, 3: Accessibility text. */
-		__( '<a href="%1$s" %2$s>Describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
+		__( '<a href="%1$s" %2$s>Learn how to describe the purpose of the image%3$s</a>. Leave empty if the image is purely decorative.' ),
 		esc_url( 'https://www.w3.org/WAI/tutorials/images/decision-tree' ),
 		'target="_blank" rel="noopener"',
 		sprintf(