build(deps): bump arc-swap from 0.4.7 to 0.4.8

Bumps [arc-swap](https://github.com/vorner/arc-swap) from 0.4.7 to 0.4.8.
- [Release notes](https://github.com/vorner/arc-swap/releases)
- [Changelog](https://github.com/vorner/arc-swap/blob/v0.4.8/CHANGELOG.md)
- [Commits](https://github.com/vorner/arc-swap/compare/v0.4.7...v0.4.8)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Cargo.lock

@@ -41,9 +41,9 @@ checksum = "2c0df63cb2955042487fad3aefd2c6e3ae7389ac5dc1beb28921de0b69f779d4"
 
 [[package]]
 name = "arc-swap"
-version = "0.4.7"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d25d88fd6b8041580a654f9d0c581a047baee2b3efee13275f2fc392fc75034"
+checksum = "dabe5a181f83789739c194cbe5a897dde195078fac08568d09221fd6137a7ba8"
 
 [[package]]
 name = "async-trait"