[libhandy] doc: Mention carousel changes in the migration guide

[Adrien Plazas <aplazas src gnome org>]

commit ca9430d8e65d968013687f9b58b21d15187e74e5
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Tue Jul 14 00:59:42 2020 +0500

    doc: Mention carousel changes in the migration guide
    
    Signed-off-by: Alexander Mikhaylenko <alexm gnome org>

 doc/hdy-migrating-0-0-to-1.xml | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/doc/hdy-migrating-0-0-to-1.xml b/doc/hdy-migrating-0-0-to-1.xml
index 2c9922ab..860d8f66 100644
--- a/doc/hdy-migrating-0-0-to-1.xml
+++ b/doc/hdy-migrating-0-0-to-1.xml
@@ -132,12 +132,15 @@
     </refsect3>
 
     <refsect3>
-      <title>Replace HdyPaginator by HdyCarousel</title>
+      <title>Adapt to HdyPaginator API changes</title>
       <para>
         HdyPaginator has been renamed HdyCarousel, so you should replace the
         former by the later.
-        Similarly, HdyPaginatorIndicatorStyle has been renamed
-        HdyCarouselIndicatorStyle.
+      </para>
+      <para>
+        The “indicator-style”, “indicator-spacing” and “center-content”
+        properties have been removed, instead use #HdyCarouselIndicatorDots
+        or #HdyCarouselIndicatorLines widgets.
       </para>
     </refsect3>