rust-toolchain: revert to using latest nightly

Revert to using latest nightly as the rust toolchain since the blocker issue
(rust-lang/rust#101988 (comment)) has
been resolved.

Signed-off-by: Andy-Python-Programmer <[email protected]>

Author: Andy-Python-Programmer

rust-toolchain

@@ -1,4 +1,3 @@
 [toolchain]
-# https://github.com/rust-lang/rust/pull/101988#issuecomment-1272407248
-channel = "nightly-2022-10-07"
+channel = "nightly"
 components = ["rust-src", "rustfmt", "clippy"]