Missing `since` annotation for `(!?)` operator
https://hackage.haskell.org/package/array-0.5.7.0/docs/Data-Array-IArray.html#v:-33--63-
A lacking "since" suggest that this operator is also available in older versions of `array`, but for GHC 9.4 and below I get this error:
```
Error: Not in scope: ‘Array.!?’
Perhaps you meant one of these:
‘Array.!’ (imported from Data.Array.IArray),
‘Array.//’ (imported from Data.Array.IArray)
Module ‘Data.Array.IArray’ does not export ‘!?’.
```
Seems only available since `array-0.5.6.0`.
issue