Automated update to rustc nightly-2026-07-30

Author: Update Nightly Rustc Bot

Cargo.toml

@@ -11,7 +11,7 @@ edition = "2018"
 rust-version = "1.74.0"
 
 [workspace.metadata.rbmt.toolchains]
-nightly = "nightly-2026-07-23"
+nightly = "nightly-2026-07-30"
 stable = "1.97.1"
 
 [features]