Help text for link text

Author: SharmaineLim

tbx/core/blocks.py

@@ -310,7 +310,9 @@ class ColourTheme(models.TextChoices):
     heading = blocks.CharBlock(required=False)
     description = blocks.RichTextBlock(features=settings.NO_HEADING_RICH_TEXT_FEATURES)
     image = ImageChooserBlock()
-    link_text = blocks.CharBlock()
+    link_text = blocks.CharBlock(
+        help_text=("This should be descriptive for accessibility."),
+    )
     page = blocks.PageChooserBlock()
 
     class Meta: