fix(deps): update rust crate async-lock to v2.8.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
async-lock	dependencies	minor	2.7.0 -> 2.8.0

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Release Notes

smol-rs/async-lock (async-lock)

v2.8.0

Compare Source

• Fix a bug where the SemaphoreGuard::acquire_arc future would busy wait under certain conditions (#​42).
• Add a Semaphore::add_permits() function to increase the number of available permits on the semaphore (#​44).
• Make RwLockReadGuard covariant over its lifetime (#​45)
• Add RwLockReadGuardArc, RwLockWriteGuardArc, and other reference counted guards for the RwLock type (#​47).
• Loosen the Send/Sync bounds on certain future types (#​48).
• Fix UB caused by the MutexGuardArc::source function allowing the user to drop an object in a different thread than the one it was acquired in (#​50). This is a breaking change, but in the name of soundness. Therefore it doesn't break any valid behavior.
• Fix a bug where this crate would not compile properly on wasm64 (#​51).

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