Bump cargo

This is not a user-visible change as Cargo's library API is not exposed by Rust,
but this way the version in 1.45.1 will appropriately match with published Cargo
0.46.1.

Author: Mark-Simulacrum

Cargo.lock

@@ -284,7 +284,7 @@ checksum = "716960a18f978640f25101b5cbf1c6f6b0d3192fab36a2d98ca96f0ecbe41010"
 
 [[package]]
 name = "cargo"
-version = "0.46.0"
+version = "0.46.1"
 dependencies = [
  "anyhow",
  "atty",