Minor grammatical fix for metadata-based correlation.

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

index.html

@@ -4639,7 +4639,7 @@ <h3>Metadata-based Correlation</h3>
 The use of different extension points described in Section
 <a href="#basic-concepts"></a> and Section <a href="#advanced-concepts"></a>
 can serve as an unintentional or unwanted correlation mechanism if the number
-of <a>issuers</a> using the specific extension type, or combination of extension types,
+of <a>issuers</a> using a specific extension type or combination of types
 is relatively small.
 For example, the use of certain types of cryptography that are only used by
 particular nation states, or revocation formats used by specific jurisdictions,