Update duckdb index files

.gitattributes

@@ -154,3 +154,4 @@ t2_es_ancora-ud-dev_DEEP.jsonl filter=lfs diff=lfs merge=lfs -text
 t2_es_filtered_lines-fix.jsonl filter=lfs diff=lfs merge=lfs -text
 t2_fr_filtered_lines-fix.jsonl filter=lfs diff=lfs merge=lfs -text
 t2_hi_hdtb-Pred-HIT.jsonl filter=lfs diff=lfs merge=lfs -text
+GEM--surface_realisation_st_2020/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

GEM--surface_realisation_st_2020/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ba1a4044d728fcafb14678008253f198ed402fc8fa20c271c1f8623eeca409ed
+size 86257664