Update spec/index.html

Co-authored-by: Thomas Tanon <thomas@pellissier-tanon.fr>

spec/index.html

@@ -11837,7 +11837,7 @@ <h2>Changes between SPARQL 1.1 Query Language and SPARQL 1.2 Query Language</h2>
         <li>Add note on deduplication of triples produced by CONSTRUCT to <a href="#construct" class="sectionRef"></a></li>
         <li>Remove historical notes on rdf:langString datatype from <a href="#func-datatype" class="sectionRef"></a></li>
         <li>Remove inconsistencies between the definitions of the set functions</li>
-        <li>Introduce a function called multiplicity to replace card[Ω](μ) to <a href="#BasicGraphPattern" class="sectionRef"></a></li>
+        <li>Introduce a function called multiplicity to replace card[Ω](μ) in <a href="#BasicGraphPattern" class="sectionRef"></a></li>
         <li>Update to Media Type language instead of MIME Type language</li>
         <li>Clarify that aggregation returns a single partial function in <a href="#sparqlGroupAggregate" class="sectionRef"></a></li>
         <li>Update Filter Evaluation language to reference more functional forms in <a href="#evaluation" class="sectionRef"></a></li>