fix some links

proposals/3916-authentication-for-media.md

@@ -36,22 +36,22 @@ This proposal supersedes [MSC1902](https://github.com/matrix-org/matrix-spec-pro
 
    | Old                                                                                                                                                              | Client-Server                                                             | Federation                                                          |
    | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------- | ------------------------------------------------------------------- |
-   | [`GET /_matrix/media/v3/preview_url`](https://spec.matrix.org/v1.4/client-server-api/#get_matrixmediav3preview_url) | `GET /_matrix/client/v1/media/preview_url` | - |
-   | [`GET /_matrix/media/v3/config`](https://spec.matrix.org/v1.4/client-server-api/#get_matrixmediav3config) | `GET /_matrix/client/v1/media/config` | - |
-   | [`GET /_matrix/media/v3/download/{serverName}/{mediaId}`](https://spec.matrix.org/v1.4/client-server-api/#get_matrixmediav3downloadservernamemediaid)            | `GET /_matrix/client/v1/media/download/{serverName}/{mediaId}`            | `GET /_matrix/federation/v1/media/download/{serverName}/{mediaId}`  |
-   | [`GET /_matrix/media/v3/download/{serverName}/{mediaId}/{fileName}`](https://spec.matrix.org/v1.4/client-server-api/#get_matrixmediav3downloadservernamemediaidfilename) | `GET /_matrix/client/v1/media/download/{serverName}/{mediaId}/{fileName}` | -                                                                 |
-   | [`GET /_matrix/media/v3/thumbnail/{serverName}/{mediaId}`](https://spec.matrix.org/v1.4/client-server-api/#get_matrixmediav3thumbnailservernamemediaid)          | `GET /_matrix/client/v1/media/thumbnail/{serverName}/{mediaId}`           | `GET /_matrix/federation/v1/media/thumbnail/{serverName}/{mediaId}` |
+   | [`GET /_matrix/media/v3/preview_url`](https://spec.matrix.org/v1.6/client-server-api/#get_matrixmediav3preview_url) | `GET /_matrix/client/v1/media/preview_url` | - |
+   | [`GET /_matrix/media/v3/config`](https://spec.matrix.org/v1.6/client-server-api/#get_matrixmediav3config) | `GET /_matrix/client/v1/media/config` | - |
+   | [`GET /_matrix/media/v3/download/{serverName}/{mediaId}`](https://spec.matrix.org/v1.6/client-server-api/#get_matrixmediav3downloadservernamemediaid)            | `GET /_matrix/client/v1/media/download/{serverName}/{mediaId}`            | `GET /_matrix/federation/v1/media/download/{serverName}/{mediaId}`  |
+   | [`GET /_matrix/media/v3/download/{serverName}/{mediaId}/{fileName}`](https://spec.matrix.org/v1.6/client-server-api/#get_matrixmediav3downloadservernamemediaidfilename) | `GET /_matrix/client/v1/media/download/{serverName}/{mediaId}/{fileName}` | -                                                                 |
+   | [`GET /_matrix/media/v3/thumbnail/{serverName}/{mediaId}`](https://spec.matrix.org/v1.6/client-server-api/#get_matrixmediav3thumbnailservernamemediaid)          | `GET /_matrix/client/v1/media/thumbnail/{serverName}/{mediaId}`           | `GET /_matrix/federation/v1/media/thumbnail/{serverName}/{mediaId}` |
 
-   **Note**: [`POST /_matrix/media/v3/upload`](https://spec.matrix.org/v1.4/client-server-api/#post_matrixmediav3upload)
+   **Note**: [`POST /_matrix/media/v3/upload`](https://spec.matrix.org/v1.6/client-server-api/#post_matrixmediav3upload)
    is **not** modified by this MSC: it is intended that it be brought into line with the other
    endpoints by a future MSC, such as [MSC3911](https://github.com/matrix-org/matrix-spec-proposals/pull/3911).
 
 2. Removal of `allow_remote` parameter from `/download`
 
    The current
-   [`/download`](https://spec.matrix.org/v1.4/client-server-api/#get_matrixmediav3downloadservernamemediaid)
+   [`/download`](https://spec.matrix.org/v1.6/client-server-api/#get_matrixmediav3downloadservernamemediaid)
    and
-   [`/thumbnail`]((https://spec.matrix.org/v1.4/client-server-api/#get_matrixmediav3thumbnailservernamemediaid)
+   [`/thumbnail`](https://spec.matrix.org/v1.6/client-server-api/#get_matrixmediav3thumbnailservernamemediaid)
    endpoints take an `allow_remote` query parameter, indicating whether the
    server should request remote media from other servers. This is redundant
    with the new endpoints, so will not be supported.