Run CI tests via cargo-expand “1.0.121” on Rust “1.91.0”

Author: regexident

.github/workflows/rust.yml

@@ -41,10 +41,10 @@ jobs:
       - uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # v1
         with:
           # update `cargo-expand` accordingly, when bumping MSRV:
-          toolchain: 1.88.0
+          toolchain: 1.91.0
           components: rust-src
       - uses: cargo-bins/cargo-binstall@dc19f1e48450eefe5a29b8da6c6b00a87d730b37 # v1.18.1
-      - run: cargo binstall cargo-expand@1.0.95 --no-confirm
+      - run: cargo binstall cargo-expand@1.0.121 --no-confirm
       - run: cargo test -- --test-threads=1
 
   fmt: