Policy 2.7.1: MRSP Issue #221: Wrong hyperlink for "Material Change" in MRSP Section 8

[Ben Wilson]

All,
I am proposing for v. 2.7.1 a minor change that corrects a hyperlink issue
in MRSP section 8.

The link to "material change" here redirects to "alteration of instruments"
- https://legal-dictionary.thefreedictionary.com/Material+Changes, which is
altogether wrong since we're talking about a "material change" to CA
operations, not changes to legal documents.

Rather than replace the hyperlink, I think it is better to say what we mean
by "material change" and replace it with "there is a change in the CA's
operations that could significantly affect a CA's ability to comply with
the requirements of this Policy."

See
https://github.com/BenWilson-Mozilla/pkipolicy/commit/fbe04aa64f931940af967ed90ab98aa95789f057.


Thanks,

Ben