Update link for some flexbox failures

See https://bugs.webkit.org/show_bug.cgi?id=180435#c16

Author: foolip

css/css-flexbox/animation/META.yml

@@ -1,6 +1,6 @@
 links:
     - product: safari
-      url: https://bugs.webkit.org/show_bug.cgi?id=180435
+      url: https://bugs.webkit.org/show_bug.cgi?id=189299
       results:
         - test: flex-basis-composition.html
           status: FAIL
@@ -22,7 +22,7 @@ links:
         - test: order-interpolation.html
           status: FAIL
     - product: webkitgtk
-      url: https://bugs.webkit.org/show_bug.cgi?id=180435
+      url: https://bugs.webkit.org/show_bug.cgi?id=189299
       results:
         - test: flex-basis-composition.html
           status: FAIL