declare support for Matrix 1.5 in our federation requests

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/api/server_server.rs

@@ -160,7 +160,7 @@ pub(crate) async fn send_request<T: OutgoingRequest>(
         .try_into_http_request::<Vec<u8>>(
             &actual_destination_str,
             SendAccessToken::IfRequired(""),
-            &[MatrixVersion::V1_4],
+            &[MatrixVersion::V1_5],
         )
         .map_err(|e| {
             warn!(