Add evaluation results on the de-en config and validation split of wmt19

Beep boop, I am a bot from Hugging Face's automatic model evaluator 👋!\
Your model has been evaluated on the de-en config and validation split of the [wmt19](https://huggingface.co/datasets/wmt19) dataset by

@WillHeld

, using the predictions stored [here](https://huggingface.co/datasets/autoevaluate/autoeval-eval-wmt19-de-en-9eb893-2069467127).\
Accept this pull request to see the results displayed on the [Hub leaderboard](https://huggingface.co/spaces/autoevaluate/leaderboards?dataset=wmt19).\
Evaluate your model on more datasets [here](https://huggingface.co/spaces/autoevaluate/model-evaluator?dataset=wmt19).

README.md

@@ -1,5 +1,5 @@
 ---
-language: 
+language:
 - en
 - de
 tags:
@@ -12,6 +12,30 @@ datasets:
 metrics:
 - bleu
 thumbnail: https://huggingface.co/front/thumbnails/facebook.png
+model-index:
+- name: facebook/wmt19-en-de
+  results:
+  - task:
+      type: translation
+      name: Translation
+    dataset:
+      name: wmt19
+      type: wmt19
+      config: de-en
+      split: validation
+    metrics:
+    - name: BLEU
+      type: bleu
+      value: 47.3619
+      verified: true
+    - name: loss
+      type: loss
+      value: 7.284519672393799
+      verified: true
+    - name: gen_len
+      type: gen_len
+      value: 29.2205
+      verified: true
 ---
 
 # FSMT