Update co2_eq_emissions so that it's shown in grams instead of kg (as per hf docs)

The hf docs describe co2_eq_emissions should be given in grams instead of kg: https://huggingface.co/docs/hub/en/model-cards-co2

README.md

@@ -31,7 +31,7 @@ inference:
     length_penalty: 0.3
     early_stopping: true
 co2_eq_emissions:
-  emissions: 1.46
+  emissions: 1460
   source: CodeCarbon
   training_type: fine-tuning
   geographical_location: Singapore