Update duckdb index files

.gitattributes

@@ -56,3 +56,4 @@ jxu124--guesswhat/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 jxu124--guesswhat/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/train/partial-index.duckdb filter=lfs diff=lfs merge=lfs -text

default/train/partial-index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ccd4f674328c205668c11531c8265d932da3e138d0935c35d36cb242727ad02d
+size 5566115840