fix: single JSON-encode release body so newlines render (no literal \n)

.gitea/workflows/deploy.yaml

@@ -59,9 +59,7 @@ jobs:
             echo "*Automated release from Gitea Actions*"
           } > /tmp/release-body.md
 
-          BODY="$(jq -Rs '.' < /tmp/release-body.md)"
-
-          PAYLOAD="$(printf '%s' "$BODY" | jq -Rs '{tag_name: $v, name: $v, body: ., draft: false, prerelease: false}' --arg v "${VERSION}")"
+          PAYLOAD="$(jq -Rs --arg v "${VERSION}" '{tag_name: $v, name: $v, body: ., draft: false, prerelease: false}' < /tmp/release-body.md)"
 
           TOKEN="${GITEA_TOKEN:-${{ secrets.GITEA_TOKEN }}}"