Fixes previous attempt to auto-hide divider

The divider prop was only being set when title was present, and the
default value for divider is true. This unconditionally sets the divider
prop.

Signed-off-by: Adam Kunicki <kunickiaj@gmail.com>

.changeset/tiny-swans-warn.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-home-react': patch
+---
+
+Fixes auto-hiding of content divider when title not specified

plugins/home-react/src/extensions.tsx

@@ -152,7 +152,8 @@ function CardExtension<T>(props: CardExtensionComponentProps<T>) {
   }
 
   const cardProps = {
-    ...(title && { title, divider: !!title }),
+    divider: !!title,
+    ...(title && { title }),
     ...(Settings && !isCustomizable
       ? {
           action: (