fixed bounding box sorting

data/output_incidental_text.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:6e5d3ef767e27cb41e2e33e6bc1c9d64e3f48f3057e00c010a2b1239e820f83f
-size 91162934
+oid sha256:9dece417f87028b8fc0fa548d5c03854c0e24b2e37b27f71b60341ea3a5c31a5
+size 91163838