Update duckdb index files

.gitattributes

@@ -216,3 +216,4 @@ sl_other/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sl_caselaw/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 da_legislation/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 el_caselaw/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+el_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

el_caselaw/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:dbc1469b4d756cf590e9c08a50ff3f2ff147739fef5962ef206fad906d6b7ebd
+size 33566720