Update duckdb index files

.gitattributes

@@ -53,3 +53,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 unklefedor--language-identification/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
+unklefedor--language-identification/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

unklefedor--language-identification/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:64c1e800aa27afd3df2d0aa46c27ebde179ff342fd11588d2e67404c851b9f1e
+size 22556672