[chore] Clarify deprecation of http.flavor (#2755)

Co-authored-by: Liudmila Molkova <[email protected]>

Author: lcian

docs/registry/attributes/http.md

@@ -113,7 +113,7 @@ Describes deprecated HTTP attributes.
 | Attribute | Type | Description | Examples | Stability |
 |---|---|---|---|---|
 | <a id="http-client-ip" href="#http-client-ip">`http.client_ip`</a> | string | Deprecated, use `client.address` instead. | `83.164.160.102` | ![Deprecated](https://img.shields.io/badge/-deprecated-red)<br>Replaced by `client.address`. |
-| <a id="http-flavor" href="#http-flavor">`http.flavor`</a> | string | Deprecated, use `network.protocol.name` instead. | `1.0`; `1.1`; `2.0` | ![Deprecated](https://img.shields.io/badge/-deprecated-red)<br>Replaced by `network.protocol.name`. |
+| <a id="http-flavor" href="#http-flavor">`http.flavor`</a> | string | Deprecated, use `network.protocol.name` and `network.protocol.version` instead. | `1.0`; `1.1`; `2.0` | ![Deprecated](https://img.shields.io/badge/-deprecated-red)<br>Split into `network.protocol.name` and `network.protocol.version` |
 | <a id="http-host" href="#http-host">`http.host`</a> | string | Deprecated, use one of `server.address`, `client.address` or `http.request.header.host` instead, depending on the usage. | `www.example.org` | ![Deprecated](https://img.shields.io/badge/-deprecated-red)<br>Replaced by one of `server.address`, `client.address` or `http.request.header.host`, depending on the usage. |
 | <a id="http-method" href="#http-method">`http.method`</a> | string | Deprecated, use `http.request.method` instead. | `GET`; `POST`; `HEAD` | ![Deprecated](https://img.shields.io/badge/-deprecated-red)<br>Replaced by `http.request.method`. |
 | <a id="http-request-content-length" href="#http-request-content-length">`http.request_content_length`</a> | int | Deprecated, use `http.request.header.content-length` instead. | `3495` | ![Deprecated](https://img.shields.io/badge/-deprecated-red)<br>Replaced by `http.request.header.content-length`. |

model/http/deprecated/registry-deprecated.yaml

@@ -128,10 +128,10 @@ groups:
               value: 'QUIC'
               brief: 'QUIC protocol.'
               stability: development
-        brief: 'Deprecated, use `network.protocol.name` instead.'
+        brief: 'Deprecated, use `network.protocol.name` and `network.protocol.version` instead.'
         deprecated:
-          reason: renamed
-          renamed_to: network.protocol.name
+          reason: uncategorized
+          note: "Split into `network.protocol.name` and `network.protocol.version`"
         stability: development
       - id: http.user_agent
         type: string