fix link error in http doc

Signed-off-by: NYhz <yinghao.zou@zilliz.com>

core/src/server/web_impl/README.md

@@ -517,7 +517,7 @@ $ curl -X GET "http://127.0.0.1:19121/collections/test_collection" -H "accept: a
   "metric_type": "L2",
   "count": 0,
   "index": "FLAT",
-  "index_params": {}
+  "index_params": {"nprobe":  16384}
 }
 ```
 
@@ -539,7 +539,7 @@ $ curl -X GET "http://127.0.0.1:19121/collections/test_collection?info=stat" -H
       "segments_stat": [
         {
           "count": 1000,
-          "index": "IVFFLAT",
+          "index": "FLAT",
           "segment_name": "1583727170217439000",
           "size": 5284922
         }
@@ -681,7 +681,7 @@ Updates the index type and nlist of a collection.
 | Parameter    | Description                                                                                                                                                                                              | Required? |
 | ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- |
 | `index_type` | The type of indexing method to query the collection. Please refer to [Index Types](https://www.milvus.io/docs/reference/index.md) for detailed introduction of supported indexes. The default is "FLAT". | No        |
-| `params`     | The extra params of indexing method to query the collection. Please refer to - [Index params](#index_param) for detailed introduction of supported indexes.                                              | No        |
+| `params`     | The extra params of indexing method to query the collection. Please refer to `Index params`(see below) for detailed introduction of supported indexes.                                              | No        |
 
 ##### Query Parameters
 
@@ -1122,7 +1122,7 @@ $ curl -X GET "http://127.0.0.1:19121/collections/test_collection/segments/15837
 | `tags`     | Tags of partitions that you need to search. You do not have to specify this value if the collection is not partitioned or you wish to search the whole collection.                           | No        |
 | `file_ids` | IDs of the vector files. You do not have to specify this value if you do not use Milvus in distributed scenarios. Also, if you assign a value to `file_ids`, the value of `tags` is ignored. | No        |
 | `vectors`  | Vectors to query.                                                                                                                                                                            | Yes       |
-| `params`   | Extra params for search. Please refer to [Search param](#index_param) to get more detail information.                                                                                        | Yes       |
+| `params`   | Extra params for search. Please refer to `Search param`(see below) to get more detail information.                                                                                        | Yes       |
 
 > Note: Type of items of vectors depends on the metric used by the collection. If the collection uses `L2` or `IP`, you must use `float`. If the collection uses `HAMMING`, `JACCARD`, or `TANIMOTO`, you must use `uint8`.
 
@@ -1543,7 +1543,7 @@ For each index type, the RESTful API has specific index parameters and search pa
 </tr>
 </table>
 
-For detailed information about the parameters above, refer to [Index Types](https://milvus.io/docs/v0.7.0/reference/index.md)
+For detailed information about the parameters above, refer to [Index Types](https://milvus-io.github.io/milvus-sdk-python/pythondoc/v0.2.8/param.html)
 
 ## Error Codes