Fix release workflow. (#54)

Signed-off-by: Takeshi Yoneda <[email protected]>

Author: mathetake

.github/workflows/release.yaml

@@ -33,7 +33,6 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
   release-doc:
-    needs: [post-release-check]
     name: release-doc
     runs-on: ubuntu-latest
     steps: