Update duckdb index files

.gitattributes

@@ -175,3 +175,4 @@ law/dev/index.duckdb filter=lfs diff=lfs merge=lfs -text
 legal_professional/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 legal_professional/dev/index.duckdb filter=lfs diff=lfs merge=lfs -text
 high_school_biology/dev/index.duckdb filter=lfs diff=lfs merge=lfs -text
+middle_school_biology/test/index.duckdb filter=lfs diff=lfs merge=lfs -text

middle_school_biology/test/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2b97b22cc9fc36cd3ec529ca57a7cb3975e5cc38b73fd659a3e5544d4195287f
+size 1060864