Merge pull request #3566 from vespa-engine/andreer/fix-include-statement

fix include statement

en/reference/schema-reference.html

@@ -3365,7 +3365,7 @@ <h2 id="index-hnsw">hnsw</h2>
 Specifies optional parameters for an HNSW index to enable faster, approximate nearest neighbor search
 using the <a href="query-language-reference.html#nearestneighbor">nearestNeighbor</a> query operator.
 
-{% include note.html content="Specifying the <code>index</code> keyword in the <a href="#indexing">indexing</a> statement of a tensor creates an HNSW index with default settings, even if this block is not specified! "%}
+{% include note.html content="Specifying the <code>index</code> keyword in the <a href='#indexing'>indexing</a> statement of a tensor creates an HNSW index with default settings, even if this block is not specified! "%}
 
 This implements a modified version of the
 Hierarchical Navigable Small World (HNSW) graphs algorithm (<a href="https://arxiv.org/abs/1603.09320">paper</a>).