docs(README): automatic update

  Update README Python
  [This list might not be relevant]
  docs(highlight): Add mention that only strings can be highlighted

Attributes cast as integer are still searched, but they are not
highlighted. This can result in confusing results in the dashboard and
integrations. I've made it explicit here.

I'm planning to write a longer guide on the subject as well. [ci skip]

Author: algoliareadmebot

README.md

@@ -877,7 +877,7 @@ You can use the following optional arguments:
         </div>
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       <td class='client-readme-param-content'>
-        <p>A string that contains the list of attributes you want to highlight according to the query. Attributes are separated by commas. You can also use a string array encoding (for example <code>[&quot;name&quot;,&quot;address&quot;]</code>). If an attribute has no match for the query, the raw value is returned. By default, all indexed attributes are highlighted. You can use <code>*</code> if you want to highlight all attributes. A matchLevel is returned for each highlighted attribute and can contain:</p>
+        <p>A string that contains the list of attributes you want to highlight according to the query. Attributes are separated by commas. You can also use a string array encoding (for example <code>[&quot;name&quot;,&quot;address&quot;]</code>). If an attribute has no match for the query, the raw value is returned. By default, all indexed attributes are highlighted (as long as they are strings). You can use <code>*</code> if you want to highlight all attributes. A matchLevel is returned for each highlighted attribute and can contain:</p>
 
 <ul>
 <li><strong>full</strong>: If all the query terms were found in the attribute.</li>