build(deps): Bump regex from 1.8.3 to 1.8.4

Bumps [regex](https://github.com/rust-lang/regex) from 1.8.3 to 1.8.4.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](rust-lang/regex@1.8.3...1.8.4)

---
updated-dependencies:
- dependency-name: regex
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -28,4 +28,4 @@ vmm = { path = "../vmm" }
 
 [dev-dependencies]
 cargo_toml = "0.15.3"
-regex = { version = "1.8.3", default-features = false, features = ["std"] }
+regex = { version = "1.8.4", default-features = false, features = ["std"] }

src/firecracker/Cargo.toml

@@ -15,7 +15,7 @@ bench = false
 [dependencies]
 libc = "0.2.146"
 nix = { version = "0.26.2", default-features = false, features = ["dir"] }
-regex = { version = "1.8.3", default-features = false, features = ["std"] }
+regex = { version = "1.8.4", default-features = false, features = ["std"] }
 thiserror = "1.0.32"
 
 utils = { path = "../utils" }