update changelog

actix-http/CHANGES.md

@@ -1,13 +1,15 @@
 # Changes
 
 ## Unreleased - 2022-xx-xx
-### Fixed
-- Websocket parser no longer throws endless overflow errors after receiving an oversized frame. [#2790]
-
 ### Changed
 - Minimum supported Rust version (MSRV) is now 1.57 due to transitive `time` dependency.
 
+### Fixed
+- Websocket parser no longer throws endless overflow errors after receiving an oversized frame. [#2790]
+- Retain previously set Vary headers when using compression encoder. [#2798]
+
 [#2790]: https://github.com/actix/actix-web/pull/2790
+[#2798]: https://github.com/actix/actix-web/pull/2798
 
 
 ## 3.1.0 - 2022-06-11

actix-web/src/middleware/compress.rs

@@ -322,7 +322,6 @@ mod tests {
         .await;
 
         let req = test::TestRequest::default()
-            .uri("/single")
             .insert_header((header::ACCEPT_ENCODING, "gzip"))
             .to_request();
         let res = test::call_service(&app, req).await;