Update build workflow

Author: wins1ey

.github/workflows/build.yml

@@ -7,5 +7,13 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Set up Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: wasm32-unknown-unknown
+
+      - name: Install wasm-pack
+        run: curl https://drager.github.io/wasm-pack/installer/init.sh -sSf | bash
+
       - name: Build library
-        run: cargo build
+        run: wasm-pack build --scope libresplit --target web --release