fix: resolve circular dependency warning

Author: mrholek

packages/coreui-vue/src/utils/getRTLPlacement.ts

@@ -1,5 +1,5 @@
 import { Placement } from '@popperjs/core'
-import { isRTL } from '../utils'
+import isRTL from './isRTL'
 
 const getRTLPlacement = (placement: string, element: HTMLDivElement | null): Placement => {
   switch (placement) {