build(deps): bump systemd from 0.7.1 to 0.8.1 in /rust

Bumps [systemd](https://github.com/jmesmon/rust-systemd) from 0.7.1 to 0.8.1.
- [Release notes](https://github.com/jmesmon/rust-systemd/releases)
- [Commits](https://github.com/jmesmon/rust-systemd/compare/systemd-0.7.1...systemd-0.8.1)

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

rust/Cargo.lock

@@ -46,9 +46,9 @@ checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
 [[package]]
 name = "build-env"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e068f31938f954b695423ecaf756179597627d0828c0d3e48c0a722a8b23cf9e"
+checksum = "6cf89846ef2b2674ef1c153256cec98fba587c72bf4ea2c4b2f6d91a19f55926"
 
 [[package]]
 name = "c_utf8"
@@ -543,9 +543,9 @@ dependencies = [
 
 [[package]]
 name = "libsystemd-sys"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11b4c4c3a5bee838207b1ed688d14823ce452fd4aab668cb51b065e694bbe489"
+checksum = "6e03fd580bcecda68dcdcd5297085ade6a3dc552cd8b030d2b94a9b089ef7ab8"
 dependencies = [
  "build-env",
  "libc",
@@ -1141,9 +1141,9 @@ dependencies = [
 
 [[package]]
 name = "systemd"
-version = "0.7.1"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "954ca4554d4e42f566a6b6a159010c70dd328efcbdd0ee8b1d230cb4dba25af7"
+checksum = "2543596c055336b02064936256d572f2893c8be356c8cd8414337f7df3d8cdd0"
 dependencies = [
  "cstr-argument",
  "foreign-types",

rust/Cargo.toml

@@ -27,7 +27,7 @@ curl = "0.4.34"
 rayon = "1.5.0"
 c_utf8 = "0.1.0"
 rand = "0.7.3"
-systemd = "0.7.1"
+systemd = "0.8.1"
 indicatif = "0.15.0"
 lazy_static = "1.4.0"
 envsubst = "0.2.0"