message: fix(modal): fixed modal tab index
diff: @@ -197,7 +197,7 @@ class BXModal extends HostListenerMixin(LitElement) {
  });
  return html`
  <a id="start-sentinel" class="${prefix}--visually-hidden" href="javascript:void 0" role="navigation"></a>
  - <div part="dialog" class=${containerClasses} role="dialog" tabidnex="-1" @click=${this._handleClickContainer}>
  + <div part="dialog" class=${containerClasses} role="dialog" tabindex="-1" @click=${this._handleClickContainer}>
  <slot></slot>
  </div>
  <a id="end-sentinel" class="${prefix}--visually-hidden" href="javascript:void 0" role="navigation"></a>
  