build: Bump getrandom from 0.2.14 to 0.2.15

Bumps [getrandom](https://github.com/rust-random/getrandom) from 0.2.14 to 0.2.15.
- [Changelog](https://github.com/rust-random/getrandom/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-random/getrandom/compare/v0.2.14...v0.2.15)

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

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

Cargo.lock

@@ -906,9 +906,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.14"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94b22e06ecb0110981051723910cbf0b5f5e09a2062dd7663334ee79a9d1286c"
+checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
  "js-sys",

net_util/Cargo.toml

@@ -6,7 +6,7 @@ version = "0.1.0"
 
 [dependencies]
 epoll = "4.3.3"
-getrandom = "0.2.14"
+getrandom = "0.2.15"
 libc = "0.2.167"
 log = "0.4.22"
 net_gen = { path = "../net_gen" }