Update the router log truncator for new axum syntax.

Signed-off-by: Jason Volk <jason@zemos.net>

src/router/layers.rs

@@ -227,6 +227,6 @@ fn request_path_str<T>(request: &http::Request<T>) -> &str {
 
 fn truncated_matched_path(path: &MatchedPath) -> &str {
 	path.as_str()
-		.rsplit_once(':')
+		.rsplit_once('{')
 		.map_or(path.as_str(), |path| path.0.strip_suffix('/').unwrap_or(path.0))
 }