feat: clear out text after posting

src/containers/AddAnnouncementForm.jsx

@@ -13,7 +13,10 @@ const AddAnnouncementForm = ({ className }) => {
   const onAdd = (evt) => {
     if (!!text) {
       addAnnouncement.run({ content: text });
+<<<<<<< HEAD
       setText("");
+=======
+>>>>>>> 553808a17622e42407bd4764fc036b589518a072
     }
   };