chore: add bootnodes to spiritnet.json

[gflow33]

fixes KILTProtocol/ticket#312

Please include a summary of the changes provided with this pull request and which issue has been fixed.
Please also provide some context if necessary.

• Add bootnodes to kilt spiritnet

New kilt bootnode, verify with :

 <kilt-binary> --chain=spiritnet --reserved-only --reserved-nodes=/dns/kilt-polkadot-boot-ng.dwellir.com/tcp/443/wss/p2p/12D3KooWRLyHNCYbYMpQWWESNqyW925VP6vMesotaAXSVB3Efhv4

<kilt-binary> --chain=spiritnet --reserved-only --reserved-nodes=/dns/kilt-polkadot-boot-ng.dwellir.com/tcp/30368/p2p/12D3KooWRLyHNCYbYMpQWWESNqyW925VP6vMesotaAXSVB3Efhv4

Metadata Diff to Develop Branch

Peregrine Diff

``` ```

Spiritnet Diff

Checklist:

• I have verified that the code works
  • No panics! (checked arithmetic ops, no indexing array[3] use get(3), ...)
• I have verified that the code is easy to understand
  • If not, I have left a well-balanced amount of inline comments
• I have left the code in a better state
• I have documented the changes (where applicable)
  • Either PR or Ticket to update the Docs
  • Link the PR/Ticket here

[ntn-x2]

Hi! I'm tracking it in this PR: #750. As there were two conflicting PRs and we did some more cleanups. Thanks for the input tho!