ci: attempt to fix failing Linux builds

Signed-off-by: Bill Nguyen <bill.nguyen@student.unsw.edu.au>

Author: dreamliner787-9

.github/workflows/sdk.yaml

@@ -34,7 +34,9 @@ jobs:
       - name: Install SDK dependencies
         run: |
           rustup target add x86_64-unknown-linux-musl
+          rustup component add rust-src --toolchain stable-x86_64-unknown-linux-gnu
           rustup target add aarch64-unknown-linux-musl
+          rustup component add rust-src --toolchain stable-aarch64-unknown-linux-musl
           sudo apt update
           sudo apt install software-properties-common
           sudo add-apt-repository ppa:deadsnakes/ppa