fix(workflow): nightly cache

Author: fumiama

.github/workflows/nightly.yml

@@ -31,6 +31,7 @@ jobs:
           go-version: '1.20'
       - name: Cache downloaded module
         uses: actions/cache@master
+        continue-on-error: true
         with:
           path: |
             ~/.cache/go-build
@@ -52,4 +53,4 @@ jobs:
         if: ${{ !github.head_ref }}
         with:
           name: ${{ matrix.goos }}_${{ matrix.goarch }}
-          path: output/
+          path: output/