build: 更新 Rust 工具链版本 (#50)

- 将 Rust 工具链从 nightly-2024-11-05 更新至 nightly-2025-08-10

Signed-off-by: longjin <[email protected]>

Author: fslongjin

Makefile

@@ -1,6 +1,6 @@
 # The toolchain we use.
 # You can get it by running DragonOS' `tools/bootstrap.sh`
-TOOLCHAIN="+nightly-2024-11-05-x86_64-unknown-linux-gnu"
+TOOLCHAIN="+nightly-2025-08-10-x86_64-unknown-linux-gnu"
 RUSTFLAGS+=""
 
 ifdef DADK_CURRENT_BUILD_DIR