fix(composables): Do not spread array inside concat function

Author: jarruda

packages/bootstrap-vue-3/src/composables/useFormCheck.ts

@@ -93,7 +93,7 @@ const getGroupClasses = (items: {
 const slotsToElements = (slots: Array<any>, nodeType: string, disabled: boolean) =>
   slots
     .reduce((acc: Array<any>, slot: any) => slot.type.name === 'Symbol(Fragment)' ?
-        acc.concat(...slot.children) : acc.concat([slot]), [])
+        acc.concat(slot.children) : acc.concat([slot]), [])
     .filter((e: any) => e.type.name === nodeType)
     .map((e: any) => {
       const txtChild = (e.children.default ? e.children.default() : []).find(