Add additional text clarifying how to match vct and doctype

[GarethCOliver]

Resolves #741 by adding more explicit instructions on what allows a Credential to satisfy vct_values, and applies similar explicit text to doctype_value

[c2bo]

I guess this should also go into 1.0 errata?

#741 also asks about the RP/Verifier side -> Should we add a sentence that these checks must be verified by the Verifier?

Text looks good otherwise imho

[c2bo]

nit

Suggested change

	doctype of the requested Verifiable Credential. It MUST be a valid doctype identifier as defined in [@ISO.18013-5]. For a mdoc to satisfy the Credential Query, the value of the `docType` element in the `MobileSecurityObject` structure MUST be equal to the `doctype_value`.
	doctype of the requested Verifiable Credential. It MUST be a valid doctype identifier as defined in [@ISO.18013-5]. For an mdoc to satisfy the Credential Query, the value of the `docType` element in the `MobileSecurityObject` structure MUST be equal to the `doctype_value`.

[Sakurann]

Suggested change

	The Wallet MUST determine whether a Credential's type satisfies a Credential Query by following these steps:
	Following steps are defined to determine whether a Credential's type satisfies a Credential Query:

incorporating Christian's suggestion and WG discussion to ensure these rules apply not just to the wallet but also the verifier

[fkj]

I don't disagree with the suggestion, but I think the normative language should be preserved even when generalizing. Something like:

Suggested change

	The Wallet MUST determine whether a Credential's type satisfies a Credential Query by following these steps:
	When a Wallet or Verifier needs to determine whether a Credential's type satisfies a Credential Query, it MUST do so by following these steps:

[Sakurann]

WG discussion: makes sense to have this in errata, too and also not to limit validation rules to the wallet but also verifier.