Update CI config

Signed-off-by: Yang Zhang <yang.zhang@pingcap.com>

Author: v01dstar

.github/workflows/rust.yml

@@ -30,7 +30,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly-2025-04-03
+          toolchain: nightly-2026-01-30
           override: true
           components: rustfmt, clippy, rust-src
       - uses: Swatinem/rust-cache@v1
@@ -92,7 +92,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly-2025-04-03
+          toolchain: nightly-2026-01-30
           override: true
           components: llvm-tools-preview
       - uses: Swatinem/rust-cache@v1