Update "Changes since v1.1" section.

index.html

@@ -7095,11 +7095,27 @@ <h2>Revision History</h2>
 it easier to understand particular concepts.
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+Clarify how issuer validation occurs.
+        </li>
+        <li>
+Clarify requirements for securing mechanism extension points.
+        </li>
+        <li>
+Add dependency on [[?INFRA]] for algorithm section.
+        </li>
+        <li>
+Add requirements for securing mechanism specifications.
+        </li>
+        <li>
+Clarify how to perform credential type-specific processing.
+        </li>
+        <li>
 Add mechanism to embed enveloped verifiable credentials in verifiable
 presentations.
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-Add verification algorithm.
+Add verification algorithm, interface to securing mechanisms, and
+ProblemDetails objects.
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 Fine tune allowable values for `issuer` property.