fix: add rust toolchain for lts build

Signed-off-by: TheWildJames <bins4us@hotmail.com>

.github/workflows/build.yml

@@ -103,6 +103,14 @@ jobs:
             echo "$BOOT_SIGN_KEY" > ./kernel-build-tools/linux-x86/share/avb/testkey_rsa2048.pem
           fi
 
+      - name: Set Up Rust for LTS
+        if: inputs.os_patch_level == 'lts'
+        run: |
+          rustup set profile minimal
+          rustup update nightly
+          rustup default nightly
+          rustup target add aarch64-unknown-none
+
       - name: Clone AnyKernel3 and Other Dependencies
         run: |
           ANYKERNEL_BRANCH="gki-2.0"