Update duckdb index files

.gitattributes

@@ -9,3 +9,4 @@ political-media-bias/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 political-media-message/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 sentiment_nuclear_power/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
 text_emotion/train/index.duckdb filter=lfs diff=lfs merge=lfs -text
+tweet_global_warming/train/index.duckdb filter=lfs diff=lfs merge=lfs -text

tweet_global_warming/train/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7405774f22d9a5dd3fdc0ea8e2c9d3455342fb8e474d8382151655466ed7800b
+size 1847296