Update duckdb index files

.gitattributes

@@ -143,3 +143,4 @@ default/gardening/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/travel/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/technology/index.duckdb filter=lfs diff=lfs merge=lfs -text
 default/relationship_advice/index.duckdb filter=lfs diff=lfs merge=lfs -text
+default/Showerthoughts/index.duckdb filter=lfs diff=lfs merge=lfs -text

default/Showerthoughts/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3563fb58ae5096f3263a0345f2208cf1eaea82aba08f7179bb98044f3681735b
+size 2877829120