fixing CI bugs

Author: zuhengxu

.github/workflows/Examples.yml

@@ -16,16 +16,15 @@ concurrency:
 jobs:
   run-examples:
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'
-          arch: 'x64'
+          arch: x64
       - uses: julia-actions/cache@v2
       - name: Run NF examples
-      - run: |
+        run: |
           cd example
           julia --project=. --color=yes -e '
           using Pkg;