Fix grammar for unsecured document.

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

index.html

@@ -1886,10 +1886,11 @@ <h2>Algorithms</h2>
 The algorithms defined below operate on documents represented as <dfn
 data-cite="RFC8259#section-4">JSON objects</dfn>. This specification follows the
 [[[JSON-LD11-API]]] specification in representing a JSON object as an
-[[[Infra]]] [=map=]. An <dfn class="export">unsecured data document</dfn> is a
-[[[Infra]]] [=map=] that has not yet had the current proof added to it, but it MAY contain a
-proof value added to it by a previous process. A <dfn class="export">secured
-data document</dfn> is a [=map=] that has had the current proof(s) added to it.
+[[[Infra]]] [=map=]. An <dfn class="export">unsecured data document</dfn> is an
+[[[Infra]]] [=map=] that has not yet had the current proof added to it, but it
+MAY contain a proof value that was added to it by a previous process. A <dfn
+class="export">secured data document</dfn> is a [=map=] that has had the current
+proof(s) added to it.
       </p>
 
       <p>