`valid-feedback` inserted in between of `CFormInput`  and `CInputGroupText`

Pls refer to the codesand box forked from official document: https://codesandbox.io/p/sandbox/fvd6lx

When there is a `CInputGroupText` after `CFormInput`. The validation message `valid-feedback` will push `CInputGroupText` to the next row. 

<img width="547" height="256" alt="Image" src="https://github.com/user-attachments/assets/df0aa40b-32f9-48a9-bd28-4ff2df81ffee" />