Specify that procedures apply to all versions of MPI

[wesbland]

Problem

The definitions of side documents that went into MPI 4.1 say that each document should specify to which version it can be applied. That was missing in the procedures document.

Proposal

Add the text

Changes to the Text

https://github.com/mpi-forum/procedures/pull/11

[wesbland]

This passed a no-no vote on 2024-03-19.

Yes	No	Abstain
29	0	3

[wesbland]

This passed a procedures vote on 2024-03-20.

Yes	No	Abstain
31	0	1