Update duckdb index files

.gitattributes

@@ -149,3 +149,4 @@ pl_all/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sl_contracts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 ro_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sv_contracts/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+sk_caselaw/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

sk_caselaw/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a714c1e8f279d5febaf4b1b6f350b7baf3e47b5c37683b4310cc87cda9f6092e
+size 60567552