Fixes problem if "excerpt" is blank

Fixes problem where if "excerpt" is blank, the first 160 characters of "content" are not displayed. This is related to "Null Coalescence doesn't return fallback if falsey variable uses a modifier #2022" issue located at statamic/cms#2022

resources/views/home.antlers.html

@@ -20,7 +20,7 @@ <h2 class="mb-4">
                 </h2>
                 <p class="text-gray-600">
                     <span class="text-gray-800 text-sm uppercase tracking-widest font-medium">{{ date }}</span> &mdash;
-                    {{ excerpt | widont ?? content | strip_tags | safe_truncate:160:...}}
+                    {{ excerpt ? excerpt | widont : content | strip_tags | safe_truncate:160:...}}
                 </p>
             </div>
         {{ /articles }}