[Chapel Merge] Update documentation to reflect that binary conver

Branch: refs/heads/main
Revision: 00c7e90
Author: jhh67
Link: Added warning that binary conversions are deprecated by jhh67 · Pull Request #19482 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #19482 from jhh67/binary-docs

Update documentation to reflect that binary conversions in formatted I/O are deprecated.

[Reviewed by @lydia-duncan]

Modified Files:
M modules/standard/IO.chpl

Compare: https://github.com/chapel-lang/chapel/compare/dfaa4cd05e70...00c7e909e152