Bump pprof from 0.3.21 to 0.4.0

Bumps [pprof](https://github.com/tikv/pprof-rs) from 0.3.21 to 0.4.0.
- [Release notes](https://github.com/tikv/pprof-rs/releases)
- [Commits](https://github.com/tikv/pprof-rs/compare/v0.3.21...v0.4.0)

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

Cargo.lock

@@ -753,9 +753,9 @@ checksum = "3831453b3449ceb48b6d9c7ad7c96d5ea673e9b470a1dc578c2ce6521230884c"
 
 [[package]]
 name = "pprof"
-version = "0.3.21"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8279bcc9c673a16a105ac0c9d2de161d2fb1344c22abb6b06614a7d291b5ea58"
+checksum = "ffccebf7f721f18477a39f99a7bae543edd02a9850a2cbfe6c407f8cc291dd89"
 dependencies = [
  "backtrace",
  "inferno",

Cargo.toml

@@ -46,7 +46,7 @@ which = "4.0"
 
 # pprof is not available on windows
 [target.'cfg(not(windows))'.dependencies]
-pprof = { version = "0.3", features = ["flamegraph"], optional = true }
+pprof = { version = "0.4", features = ["flamegraph"], optional = true }
 
 [badges]
 maintenance = { status = "actively-developed" }