Merge pull request #189 from matrix-org/quenting/clippy-1.81.0

chore(ci): bump clippy in CI to 1.81.0

Author: sandhose

.github/workflows/check.yaml

@@ -43,8 +43,8 @@ jobs:
 
       - name: Install toolchain
         run: |
-          rustup toolchain install 1.79.0
-          rustup default 1.79.0
+          rustup toolchain install 1.81.0
+          rustup default 1.81.0
           rustup component add clippy
 
       - name: Setup Rust cache