Fix Rust toolchain in CI

Author: DanielleHuisman

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
               uses: actions/checkout@v4
 
             - name: Set up Rust toolchain
-              run: rustup toolchain install stable --no-self-update --profile default --target wasm32-unknown-unknown
+              run: rustup toolchain nightly stable --no-self-update --profile default --target wasm32-unknown-unknown
 
             - name: Set up Rust cache
               uses: swatinem/rust-cache@v2