Update duckdb index files

.gitattributes

@@ -96,3 +96,4 @@ swiss_law_area_prediction_sub_area_considerations/validation/index.duckdb filter
 swiss_law_area_prediction_facts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 greek_legal_code_chapter/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 greek_legal_code_subject/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+greek_legal_code_volume/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

greek_legal_code_volume/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f4d80471b6ef98e4672793bf5c5099d9819c70e617720f8d84bcac8ba1c62b62
+size 78655488