fix: use header instead of body

Author: shenxianpeng

.github/workflows/release-drafter.yml

@@ -62,6 +62,6 @@ jobs:
       - uses: release-drafter/release-drafter@b1476f6e6eb133afa41ed8589daba6dc69b4d3f5 # v6.1.0
         with:
           commitish: 'main'
-          body: ${{ env.RELEASE_BODY }}
+          header: ${{ env.RELEASE_BODY }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}