Update duckdb index files

.gitattributes

@@ -142,3 +142,4 @@ cqadupstack-gis-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-mathematica-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-mathematica-qrels/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 cqadupstack-mathematica-queries/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+cqadupstack-physics-corpus/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

cqadupstack-physics-corpus/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ef6387fbd5d328778a3730af2a84c5e50115b409c9ea8e5143bac290921a6326
+size 231485440