Bump ctor from 0.1.19 to 0.1.20 in /src/rust (#5930)

Bumps [ctor](https://github.com/mmastrac/rust-ctor) from 0.1.19 to 0.1.20.
- [Release notes](https://github.com/mmastrac/rust-ctor/releases)
- [Commits](https://github.com/mmastrac/rust-ctor/commits)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/rust/Cargo.lock

@@ -21,9 +21,9 @@ dependencies = [
 
 [[package]]
 name = "ctor"
-version = "0.1.19"
+version = "0.1.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8f45d9ad417bcef4817d614a501ab55cdd96a6fdb24f49aab89a54acfd66b19"
+checksum = "5e98e2ad1a782e33928b96fc3948e7c355e5af34ba4de7670fe8bac2a3b2006d"
 dependencies = [
  "quote",
  "syn",