Update spec/index.html

Co-authored-by: Olaf Hartig <[email protected]>

Author: afs

spec/index.html

@@ -5848,7 +5848,7 @@ <h5>SameValue</h5>
               <p>
                 The <a href="#OperatorMapping">Operator Mapping</a> for "`=`""
                 is the function
-                <a data-cite="XPATH-FUNCTIONS-31#func-numeric-equal">fn:numeric-equal`</a>
+                <a data-cite="XPATH-FUNCTIONS-31#func-numeric-equal">`fn:numeric-equal`</a>
                 which returns `false` when comparing arguments involving `NaN`.
                 However, `sameTerm("NaN"^^xsd:double, "NaN"^^xsd:double)` is true;
                 `sameValue` treats "NaN" as the "same value".