Bump nix from 0.26.2 to 0.27.1 in /src/agent

Bumps [nix](https://github.com/nix-rust/nix) from 0.26.2 to 0.27.1.
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.26.2...v0.27.1)

---
updated-dependencies:
- dependency-name: nix
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/agent/coverage/Cargo.toml

@@ -22,7 +22,7 @@ thiserror = "1.0"
 debugger = { path = "../debugger" }
 
 [target.'cfg(target_os = "linux")'.dependencies]
-nix = "0.26"
+nix = "0.27"
 pete = "0.10"
 # For procfs, opt out of the `chrono` freature; it pulls in an old version
 # of `time`. We do not use the methods that the `chrono` feature enables.

src/agent/onefuzz-agent/Cargo.toml

@@ -43,7 +43,7 @@ azure_storage_blobs = { version = "0.12", default-features = false, features = [
 
 
 [target.'cfg(target_family = "unix")'.dependencies]
-nix = "0.26"
+nix = "0.27"
 
 [target.'cfg(target_family = "windows")'.dependencies]
 winapi = "0.3"

src/agent/onefuzz/Cargo.toml

@@ -55,7 +55,7 @@ winapi = { version = "0.3", features = ["impl-default", "psapi"] }
 
 [target.'cfg(target_family = "unix")'.dependencies]
 cpp_demangle = "0.4"
-nix = "0.26"
+nix = "0.27"
 
 [target.'cfg(target_os = "linux")'.dependencies]
 pete = "0.10"