upgrade nix to 0.26.1 (#13230)

substrate/Cargo.lock

@@ -4640,19 +4640,6 @@ dependencies = [
  "tokio",
 ]
 
-[[package]]
-name = "nix"
-version = "0.23.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f3790c00a0150112de0f4cd161e3d7fc4b2d8a5542ffc35f099a2562aecb35c"
-dependencies = [
- "bitflags",
- "cc",
- "cfg-if",
- "libc",
- "memoffset 0.6.5",
-]
-
 [[package]]
 name = "nix"
 version = "0.24.3"
@@ -4731,7 +4718,7 @@ dependencies = [
  "jsonrpsee",
  "kitchensink-runtime",
  "log",
- "nix 0.23.2",
+ "nix 0.26.1",
  "node-executor",
  "node-inspect",
  "node-primitives",

substrate/bin/node/cli/Cargo.toml

@@ -117,7 +117,7 @@ sp-blockchain = { version = "4.0.0-dev", path = "../../../primitives/blockchain"
 futures = "0.3.21"
 tempfile = "3.1.0"
 assert_cmd = "2.0.2"
-nix = "0.23"
+nix = { version = "0.26.1", features = ["signal"] }
 serde_json = "1.0"
 regex = "1.6.0"
 platforms = "2.0"