Fix typos (#2406)

management/templates/index.html

@@ -73,7 +73,7 @@
           filter: invert(100%) hue-rotate(180deg);
         }
 
-        /* Override Boostrap theme here to give more contrast. The black turns to white by the filter. */
+        /* Override Bootstrap theme here to give more contrast. The black turns to white by the filter. */
         .form-control {
           color: black !important;
         }