Update duckdb index files

.gitattributes

@@ -59,3 +59,4 @@ default/japanese.stackexchange.com/index.duckdb filter=lfs diff=lfs merge=lfs -t
 default/anime.stackexchange.com_simple/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/ja.stackoverflow.com_simple/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/japanese.stackexchange.com_simple/index.duckdb filter=lfs diff=lfs merge=lfs -text
+anime.stackexchange.com/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

anime.stackexchange.com/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c6597efeccf7a7dc80ba63cd3d38af928b98f5b07138610d689d1e4f4ab045e8
+size 69218304