leave specifics out of it

Signed-off-by: Tom Hennen <tomhennen@google.com>

docs/spec/draft/principles.md

@@ -126,8 +126,8 @@ to reveal their legal identity.**
 
 **Reasoning**: SLSA uses identities for multiple purposes: as a trust anchor for attestations
 (i.e. who or what is making this claim and do I trust it to do so) or for attributing actions
-to an actor. Choice of identification technology is left to the platform that provides the
-action (e.g. username, cryptographic signing key, etc.).
+to an actor. Choice of identification technology is left to the organization and technical
+stacks implementing the SLSA standards.
 
 When identities are strongly authenticated and used consistently they can often be leveraged
 for both of these purposes without requiring them to be mapped to legal identities.