fix: use outputs in build job

.github/workflows/main.yml

@@ -6,6 +6,8 @@ on:
 jobs:
     build:
         runs-on: ubuntu-latest
+        outputs:
+            cache-primary-key: ${{ steps.cache.outputs.cache-primary-key }}
         steps:
             -   uses: actions/checkout@v3
             -   name: Use Node.js
@@ -29,7 +31,7 @@ jobs:
             -  uses: actions/cache/restore@v3
                with:
                    path: .
-                   key: ${{ needs.build.steps.cache.outputs.cache-primary-key }}
+                   key: ${{ needs.build.outputs.cache-primary-key }}
             -   name: Install SSH key
                 uses: shimataro/ssh-key-action@v2
                 with: