feat: ensure spacing

src/fellchensammlung/templates/fellchensammlung/details/detail-adoption-notice.html

@@ -151,7 +151,7 @@
                         <input type="hidden" name="url" value="{{ adoption_notice.further_information }}">
                         <button class="button is-primary is-fullwidth" type="submit" id="submit">
                             {{ adoption_notice.further_information | domain }} <i
-                                class="fa-solid fa-arrow-up-right-from-square"></i>
+                                class="fa-solid fa-arrow-up-right-from-square fa-fw"></i>
                         </button>
                     </form>
                 {% endif %}