Revert "ci: replace deprecated set-output"

This reverts commit e4dbd63.

Author: idleberg

.github/workflows/nodejs.yml

@@ -72,7 +72,8 @@ jobs:
 
       - name: "Get pnpm store directory"
         id: pnpm-cache
-        run: echo "pnpm_store_path=$(pnpm store path)" >> $GITHUB_OUTPUT
+        run: |
+          echo "::set-output name=pnpm_store_path::$(pnpm store path)"
 
       - uses: actions/cache@v4
         name: "Setup pnpm cache"