Update duckdb index files

.gitattributes

@@ -66,3 +66,4 @@ wo/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 bn/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 gu/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 hi/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+ig/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

ig/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3b7dd63a62a8134affb6f9fa06ea2d54a7912c892de911f797ed428e24df32d9
+size 511193088