Update openid-4-verifiable-credential-issuance-1_0.md

Co-authored-by: Kristina <[email protected]>

openid-4-verifiable-credential-issuance-1_0.md

@@ -803,7 +803,7 @@ This specification defines the following proof types:
 
 * `jwt`: A JWT [@!RFC7519] is used for proof of possession. When a `proof_type` parameter in a `proof` object is set to `jwt`, it MUST also contain a `jwt` parameter that includes a JWT as defined in (#jwt-proof-type). When a `proofs` object is using a `jwt` proof type, it MUST include a `jwt` parameter with its value being an array of JWTs, where each JWT is formed as defined in (#jwt-proof-type).
 * `ldp_vp`: A W3C Verifiable Presentation object signed using the Data Integrity Proof [@VC_Data_Integrity] as defined in [@VC_DATA_2.0] or [@VC_DATA] is used for proof of possession. When a `proof_type` parameter in a `proof` object is set to `ldp_vp`, it MUST also contain an `ldp_vp` parameter that includes a [W3C Verifiable Presentation](https://www.w3.org/TR/vc-data-model-2.0/#presentations-0) defined in (#ldp-vp-proof-type). When a `proofs` object is using a `ldp_vp` proof type, it MUST include an `ldp_vp` parameter with its value being an array of [W3C Verifiable Presentations](https://www.w3.org/TR/vc-data-model-2.0/#presentations-0), where each of these W3C Verifiable Presentation is formed as defined in (#ldp-vp-proof-type).
-* `attestation`:  A JWT [@!RFC7519] representing a key attestation without proof of possession is used. When a `proof_type` parameter in a `proof` object is set to `attestation`, it MUST also contain an `attestation` parameter that includes a JWT as defined in (#attestation-proof-type).
+* `attestation`:  A JWT [@!RFC7519] representing a key attestation without using a proof of possession of the cryptographic key material that is being attested. When a `proof_type` parameter in a `proof` object is set to `attestation`, the object MUST also contain an `attestation` parameter that includes a JWT as defined in (#attestation-proof-type).
 
 #### `jwt` Proof Type {#jwt-proof-type}