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
 wujohns--gpt2-chitchat-learn/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+wujohns--gpt2-chitchat-learn/valid/index.duckdb filter=lfs diff=lfs merge=lfs -text

wujohns--gpt2-chitchat-learn/valid/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4939812fbf8e77ab5ef4a563b089e7bc3a11e4a014815cf848e1c6ba28dc95ae
+size 2895872