cmpv2: fix content of PkiBody::PollReq

[tomsik68]

Hey all, my PR is related to the cmpv2 crate.

I noticed that PkiBody::PollReq and PkiBody::PollRep have the same variant content:

enum PkiBody<'a> {
    PollReq(PollRepContent<'a>),
    PollRep(PollRepContent<'a>),
}

In RFC4210 section 5.1.2, they are declared as follows:

/// PKIBody ::= CHOICE {       -- message-specific body elements
///     ...other variants omitted for brevity...
///     pollReq  [25] PollReqContent,         --Polling request
///     pollRep  [26] PollRepContent          --Polling response
/// }

I believe this discrepancy was unintended and my PR fixes it. Please let me know if you have any feedback.

Thank you!

[carl-wallace]

That looks right to me. Thanks.