Merge branch 'fix/fsync-call-propagation-to-secondary-console' into 'master'

fix(console): Fsync not propagated to secondary output

Closes IDFGH-12104

See merge request espressif/esp-idf!30195

components/esp_vfs_console/vfs_console.c

@@ -98,7 +98,11 @@ int console_fcntl(int fd, int cmd, int arg)
 
 int console_fsync(int fd)
 {
-    return fsync(vfs_console.fd_primary);
+    const int ret_val = fsync(vfs_console.fd_primary);
+#if CONFIG_ESP_CONSOLE_SECONDARY_USB_SERIAL_JTAG
+    (void)fsync(vfs_console.fd_secondary);
+#endif
+    return ret_val;
 }
 
 #ifdef CONFIG_VFS_SUPPORT_DIR