Revert "Bump asdf-vm/actions from 3 to 4" (#8)

Reverts zigcc/asdf-zig#7

Author: jiacai2050

.github/workflows/workflow.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: asdf_plugin_test
-        uses: asdf-vm/actions/plugin-test@v4
+        uses: asdf-vm/actions/plugin-test@v3
         with:
           command: zig version
 
@@ -31,7 +31,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup asdf
-        uses: asdf-vm/actions/setup@v4
+        uses: asdf-vm/actions/setup@v3
 
       - name: Install bats-core
         run: brew install bats-core