`sizeofMutableByteArray#` is deprecated

```
lib/Text/Regex/TDFA/NewDFA/Engine_FA.hs:625:10: warning: [GHC-68441] [-Wdeprecations]
    In the use of ‘sizeofMutableByteArray#’
    (imported from GHC.Exts, but defined in GHC.Prim):
    Deprecated: " Use 'getSizeofMutableByteArray#' instead "
    |
625 |     case sizeofMutableByteArray# msource        of { n# ->
    |          ^^^^^^^^^^^^^^^^^^^^^^^
```