Update website-search.qmd (#1415)

Document quarto-cli/pulls/11191

docs/websites/website-search.qmd

@@ -190,7 +190,7 @@ website:
       tagFilters: ['tag1','tag2']
 ```
 
-## Disabling Search
+## Disabling/Forcing Search
 
 You can disable search for an individual document by adding `search: false` to the document metadata. For example:
 
@@ -207,3 +207,8 @@ If you'd like to disable search support for an entire website, you can do so by
 website:
   search: false
 ```
+
+### Forcing the inclusion of individual elements
+
+If you need elements from the document to be included in the search that otherwise wouldn't, add the `quarto-include-in-search-index` class to the element.
+To include only a portion of a paragraph, etc, wrap the text in a span or a div and add the class to the element.