Fix ios toolchain version

Author: mugikhan

.github/workflows/ios.yml

@@ -13,7 +13,7 @@ jobs:
 
       - name: Setup
         run: |
-          rustup toolchain install nightly-2024-05-18-x86_64-apple-darwin
+          rustup toolchain install nightly-2024-05-18-aarch64-apple-darwin
           rustup component add rust-src --toolchain nightly-2024-05-18-aarch64-apple-darwin
           rustup target add \
             x86_64-apple-darwin \