Update asdf-vm/actions action to v4

Author: renovate[bot]

.github/workflows/workflow.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: asdf_plugin_test
-        uses: asdf-vm/actions/plugin-test@v1
+        uses: asdf-vm/actions/plugin-test@v4
         with:
           command: ocaml --version
         env: