Update parquet files

plain_text/sc2q_commoncrawl-test.parquet

@@ -1,3 +1,3 @@
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+size 23551279

plain_text/sc2q_commoncrawl-train.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
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-size 135146451
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+size 135146452

plain_text/sc2q_commoncrawl-validation.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
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+size 18277767