fix(storage): headers overridden (#384)

Author: grdsdev

Sources/Storage/StorageApi.swift

@@ -31,7 +31,7 @@ public class StorageApi: @unchecked Sendable {
   @discardableResult
   func execute(_ request: HTTPRequest) async throws -> HTTPResponse {
     var request = request
-    request.headers.merge(with: HTTPHeaders(configuration.headers))
+    request.headers = HTTPHeaders(configuration.headers).merged(with: request.headers)
 
     let response = try await http.send(request)