chore: Bump nightly Rust toolchain to nightly-2025-10-23

Author: Techassi

config/versions.yaml

@@ -7,7 +7,7 @@ rust_version: 1.89.0
 # This nightly version is only used for cargo fmt invocations, because we use nightly-only
 # rustfmt config options in rustfmt.toml. The version should be kept in line with the version
 # used in the operator-rs repository.
-rust_nightly_version: nightly-2025-05-26
+rust_nightly_version: nightly-2025-10-23
 
 # This edition is mostly used for rustfmt commands and the rustfmt config file. The edition should
 # be kept in line with the edition in the operator-rs repository.