Fix skip offset calculation in connection info manager

This fixes the failing XREADGROUP test. When calling position() after skip(), the value does not consider the skipped elements, so we must add the number of skipped elements to the index.

src/network/command_info_manager.rs

@@ -118,7 +118,7 @@ impl CommandInfoManager {
                             .iter()
                             .skip(*start_from as usize - 1)
                             .position(|arg| arg.as_slice() == keyword.as_bytes())
-                            .map(|i| i + 1)
+                            .map(|i| i + *start_from as usize)
                     } else {
                         slice
                             .iter()