chore: bump rustfmt toolchain to nightly-2025-10-07

Bumping the toolchain version as part of a git subtree push.

current toolchain (nightly-2025-04-02):
   - 1.88.0-nightly (e2014e876 2025-04-01)

latest toolchain (nightly-2025-10-07):
   - 1.92.0-nightly (f6aa851db 2025-10-07)

Author: jieyouxu

rust-toolchain

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2025-04-02"
+channel = "nightly-2025-10-07"
 components = ["llvm-tools", "rustc-dev"]