Auto merge of rust-lang#7989 - couchand:2021-11/toolchain-missing-components, r=flip1995

Add missing components to rust-toolchain file

Somehow these basic components are missing from the toolchain file...

changelog: none

Author: bors

rust-toolchain

@@ -1,3 +1,3 @@
 [toolchain]
 channel = "nightly-2021-11-18"
-components = ["llvm-tools-preview", "rustc-dev", "rust-src", "rustfmt"]
+components = ["cargo", "llvm-tools-preview", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"]