style/floating buttons: fix typo

Author: adoriandoran

apps/client/src/stylesheets/theme-next/shell.css

@@ -1790,10 +1790,11 @@ div.floating-buttons-children .close-floating-buttons:has(.close-floating-button
     font-size: var(--floating-button-icon-size);
 }
 
-/* Button gropus */
+/* Button groups */
 :root .floating-buttons .btn-group {
     --button-group-active-button-background-color: var(--low-profile-button-active-background-color);
     --button-group-active-button-color: var(--low-profile-button-active-color);
+
     background: transparent;
     padding: 0;