[Chapel Merge] Update message-order-fence description

Branch: refs/heads/main
Revision: 437225b36cf8f2a0bfc384924bb6fd67ff0db84b
Author: jhh67
Link: Update message-order-fence description by jhh67 · Pull Request #24873 · chapel-lang/chapel · GitHub
Log Message:
Update message-order-fence description (#24873)

Update the message-order-fence description to include
FI_ORDER_RMA_WAW, which is necessary to provide sequential consistency
for individual tasks.

[Reviewed by @jabraham17, thank you.]

Compare: Comparing 2eed0d2d3e955533309472241d2c53baea9a42b2...aa812589cdab11e0c9bdc70861a631809130ea06 · chapel-lang/chapel · GitHub

Diff:
M runtime/src/comm/ofi/README.md
https://github.com/chapel-lang/chapel/pull/24873.diff