Fix rust-src component by specifying nightly toolchain version in build workflow

Author: wizicer

.github/workflows/build-wasm.yml

@@ -44,8 +44,8 @@ jobs:
       - name: Add wasm32 target
         run: rustup target add wasm32-unknown-unknown
 
-      - name: Add rust-src
-        run: rustup component add rust-src
+      - name: fix rust-src
+        run: rustup component add rust-src --toolchain nightly-2023-09-19-x86_64-unknown-linux-gnu
 
       - name: Cache dependencies
         uses: actions/cache@v4