Fix artifact glob

Author: calebzulawski

.github/workflows/build-toolchain.yml

@@ -233,9 +233,7 @@ jobs:
       - name: Download Artifacts
         uses: actions/download-artifact@v4
         with:
-          pattern: |
-            llvm-*
-            sysroot-*
+          pattern: '{llvm,sysroot}-*'
           path: artifacts/
           merge-multiple: True
       - run: |