Fix mangled error Display impls

These were formatting the literal integer 0 instead of the inner data.

quinn-proto/src/connection/mod.rs

@@ -3365,10 +3365,10 @@ pub enum ConnectionError {
     #[error("{0}")]
     TransportError(#[from] TransportError),
     /// The peer's QUIC stack aborted the connection automatically
-    #[error("aborted by peer: {}", 0)]
+    #[error("aborted by peer: {0}")]
     ConnectionClosed(frame::ConnectionClose),
     /// The peer closed the connection
-    #[error("closed by peer: {}", 0)]
+    #[error("closed by peer: {0}")]
     ApplicationClosed(frame::ApplicationClose),
     /// The peer is unable to continue processing this connection, usually due to having restarted
     #[error("reset by peer")]

quinn-proto/src/connection/streams/recv.rs

@@ -304,7 +304,7 @@ pub enum ReadError {
     /// The peer abandoned transmitting data on this stream.
     ///
     /// Carries an application-defined error code.
-    #[error("reset by peer: code {}", 0)]
+    #[error("reset by peer: code {0}")]
     Reset(VarInt),
     /// The stream has not been opened or was already stopped, finished, or reset
     #[error("unknown stream")]

quinn-proto/src/connection/streams/send.rs

@@ -142,7 +142,7 @@ pub enum WriteError {
     /// Carries an application-defined error code.
     ///
     /// [`StreamEvent::Finished`]: crate::StreamEvent::Finished
-    #[error("stopped by peer: code {}", 0)]
+    #[error("stopped by peer: code {0}")]
     Stopped(VarInt),
     /// The stream has not been opened or has already been finished or reset
     #[error("unknown stream")]
@@ -170,7 +170,7 @@ pub enum FinishError {
     /// Carries an application-defined error code.
     ///
     /// [`StreamEvent::Finished`]: crate::StreamEvent::Finished
-    #[error("stopped by peer: code {}", 0)]
+    #[error("stopped by peer: code {0}")]
     Stopped(VarInt),
     /// The stream has not been opened or was already finished or reset
     #[error("unknown stream")]