Replace yanked dependency

[JaderDias]

Description

When running cargo deny check advisories

warning[unsound]: Initialisation failure in Once::try_call_once can lead to undefined behaviour for other initialisers
┌─ /home/j/aws-activity-pub/Cargo.lock:170:1
│
170 │ spin 0.9.7 registry+https://github.com/rust-lang/crates.io-index
│ ---------------------------------------------------------------- unsound advisory detected
│
= ID: RUSTSEC-2023-0031
= Advisory: https://rustsec.org/advisories/RUSTSEC-2023-0031
= Once::try_call_once is unsound if invoked more than once concurrently and any call fails to initialise successfully.
= Announcement: mvdnes/spin-rs#148
= Solution: Upgrade to >=0.9.8
= spin v0.9.7
└── multer v2.0.4
└── rocket v0.5.0-rc.3
└── library v0.1.0
└── (dev) aws-activitypub v0.1.0

error[yanked]: detected yanked crate
┌─ /home/j/aws-activity-pub/Cargo.lock:170:1
│
170 │ spin 0.9.7 registry+https://github.com/rust-lang/crates.io-index
│ ---------------------------------------------------------------- yanked version
│
= spin v0.9.7
└── multer v2.0.4
└── rocket v0.5.0-rc.3
└── library v0.1.0
└── (dev) aws-activitypub v0.1.0

[JaderDias]

All I had to do was to regenerate my cargo.lock