Update tokenizer, configuration and training reports

reports/run/metrics.jsonl

@@ -1021,3 +1021,5 @@
 {"step": 20420, "tokens": 10705960960, "loss": 2.753704071044922, "tokens_per_second": 980687.0851026584, "lr": 0.0015, "gradient_norm": 0.1481383889913559, "benchmark": false}
 {"step": 20440, "tokens": 10716446720, "loss": 2.753870964050293, "tokens_per_second": 978169.9813464287, "lr": 0.0015, "gradient_norm": 0.15416103601455688, "benchmark": false}
 {"step": 20460, "tokens": 10726932480, "loss": 2.7352483749389647, "tokens_per_second": 978425.8752704178, "lr": 0.0015, "gradient_norm": 0.15846577286720276, "benchmark": false}
+{"step": 20480, "tokens": 10737418240, "loss": 2.733202362060547, "tokens_per_second": 989329.4571691591, "lr": 0.0015, "gradient_norm": 0.14727097749710083, "benchmark": false}
+{"step": 20500, "tokens": 10747904000, "loss": 2.743163299560547, "tokens_per_second": 990398.8649932749, "lr": 0.0015, "gradient_norm": 0.14675293862819672, "benchmark": false}