Fix proximity precision codesample

Author: ellnix

.code-samples.meilisearch.yaml

@@ -1611,7 +1611,7 @@ search_parameter_guide_facet_stats_1: |-
 get_proximity_precision_settings_1: |-
   let proximity_precision: String = client
     .index("books")
-    .get_typo_tolerance()
+    .get_proximity_precision()
     .await
     .unwrap();
 update_proximity_precision_settings_1: |-