chore: Update litep2p to v0.8.3 (#6742)
## [0.8.3] - 2024-12-03
This release includes two fixes for small memory leaks on edge-cases in
the notification and request-response protocols.
### Fixed
- req-resp: Fix memory leak of pending substreams
([#297](https://github.com/paritytech/litep2p/pull/297))
- notification: Fix memory leak of pending substreams
([#296](https://github.com/paritytech/litep2p/pull/296))
cc @paritytech/networking
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Signed-off-by: Alexandru Vasile <[email protected]>