Update duckdb index files

.gitattributes

@@ -70,3 +70,4 @@ AsakusaRinne--Gaokao_bench/train/index.duckdb filter=lfs diff=lfs merge=lfs -tex
 2012-2022_English_Cloze_Test/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 2010-2013_English_MCQs/dev/index.duckdb filter=lfs diff=lfs merge=lfs -text
 2010-2022_Geography_MCQs/dev/index.duckdb filter=lfs diff=lfs merge=lfs -text
+2010-2022_Chemistry_MCQs/dev/index.duckdb filter=lfs diff=lfs merge=lfs -text

2010-2022_Chemistry_MCQs/dev/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8969632ab77d6e39b4be090f5c91a534125bdc1e09c77b43b0a0ff530a595a57
+size 1060864