Update Rust crate cargo_toml to 0.21 (#21880)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [cargo_toml](https://lib.rs/cargo_toml)
([source](https://gitlab.com/lib.rs/cargo_toml)) |
workspace.dependencies | minor | `0.20` -> `0.21` |

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Release Notes:

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Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "activity_indicator"
@@ -2256,9 +2256,9 @@ dependencies = [
 
 [[package]]
 name = "cargo_toml"
-version = "0.20.5"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88da5a13c620b4ca0078845707ea9c3faf11edbc3ffd8497d11d686211cd1ac0"
+checksum = "5fbd1fe9db3ebf71b89060adaf7b0504c2d6a425cf061313099547e382c2e472"
 dependencies = [
  "serde",
  "toml 0.8.19",

Cargo.toml

@@ -361,7 +361,7 @@ blade-util = { git = "https://github.com/kvark/blade", rev = "e142a3a5e678eb6a13
 blake3 = "1.5.3"
 bytes = "1.0"
 cargo_metadata = "0.19"
-cargo_toml = "0.20"
+cargo_toml = "0.21"
 chrono = { version = "0.4", features = ["serde"] }
 clap = { version = "4.4", features = ["derive"] }
 cocoa = "0.26"