Update Xylume TestNet RPC

[debxylen]

Updated the Xylume TestNet RPC URL.
Old: https://xyl-testnet.glitch.me/rpc/
New: https://xylume-testnet.sparked.network/rpc/

[github-actions]

You successfully submitted a PR! Due to the amount of PRs coming in: we will only look at PRs that the CI is happy with. We can also not hold your hand getting the CI green - just look how others that where merged did it and RTFM. So as long as there is any CI check that reports an error - no human will look at this. You might be able to ask for some support after supporting the project - e.g. by sending funds to lists.eth. When you fixed things after a requested change - then you also need to (re-)request a review.

[debxylen]

[Also updated native currency name]

[debxylen]

it has been two weeks, hopefully will be accepted soon because this is an urgent and high-change in the information. the entire rpc urls and stuff has been changed, and unless updated on this repo, will make the chainlink and chainid.network connections dead.