Fix grammar in proof validation section.

Co-authored-by: Ted Thibodeau Jr <[email protected]>

index.html

@@ -6715,14 +6715,14 @@ <h3>Proofs (Signatures)</h3>
 
         <ul>
           <li>
-The proof is available in a form defined by a known cryptographic suite.
+The cryptographic proof is available in a form defined by a known cryptographic suite.
           </li>
           <li>
-All required proof [=properties=] are present.
+All required cryptographic proof [=properties=] are present.
           </li>
           <li>
-The proof [=verification=] algorithm, when applied to the data, results in an
-acceptable proof.
+The cryptographic proof [=verification=] algorithm, when applied to the data, results in an
+accepted cryptographic proof.
           </li>
         </ul>
 
@@ -6733,11 +6733,12 @@ <h3>Proofs (Signatures)</h3>
 
         <ul>
           <li>
-Acceptably recent metadata regarding the [=verification material=], such as a
-public key, associated with the signature is available. For example, the
-metadata might include [=properties=] related to public key validity periods,
-the controller of the public key, or the public key purpose, such as
-authentication or encryption, for which it is authorized.
+Acceptably recent metadata regarding the [=verification material=]
+associated with the signature is available. For example, if the
+[=verification material=] is a public key, the
+metadata might include [=properties=] related to the validity period,
+the controller, or the authorized purpose, such as
+authentication or encryption, of the public key.
           </li>
           <li>
 The public key is not suspended, revoked, or expired.