Update duckdb index files

.gitattributes

@@ -346,3 +346,4 @@ el_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 el_other/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 el_other/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 el_wikipedia/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+en_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

en_caselaw/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:888bd3b5a7abdcce3cce355cbe1c1af422f838fada0226110aab655afb4005e7
+size 22556672