fix(ci): pull current branch instead of hardcoded main

.gitea/workflows/deploy.yml

@@ -22,7 +22,8 @@ jobs:
           cd /root/k8syaml/NovalRedot
 
           echo "📥 拉取最新代码..."
-          git pull origin main
+          BRANCH="${GITHUB_REF_NAME:-master}"
+          git pull origin "${BRANCH}"
 
           NEW_COMMIT_SHA=$(git rev-parse --short HEAD)
           NEW_COMMIT_MSG=$(git log -1 --oneline)