Added dataset element to metadata

Expected by the huggingface_hub ModelInfo API (prevent warnings in Python code).

README.md

@@ -8,16 +8,19 @@ tags:
 - translation
 - marian
 metrics:
-  - bleu
-  - cer
-  - chrf
-  - cer
-  - wer
-  - wil
-  - wip
+- bleu
+- cer
+- chrf
+- cer
+- wer
+- wil
+- wip
 widget:
- - text: "The Curriculum and Assessment (Wales) Act 2021 (the Act) established the Curriculum for Wales and replaced the general curriculum used up until that point."
-   example_title: "Example 1"
+- text: >-
+    The Curriculum and Assessment (Wales) Act 2021 (the Act) established the
+    Curriculum for Wales and replaced the general curriculum used up until that
+    point.
+  example_title: Example 1
 model-index:
 - name: mt-dspec-legislation-en-cy
   results:
@@ -25,18 +28,21 @@ model-index:
       name: Translation
       type: translation
     metrics:
-      - type: bleu
-        value: 65.51
-      - type: cer
-        value: 0.28
-      - type: chrf
-        value: 74.69
-      - type: wer
-        value: 0.39
-      - type: wil
-        value: 0.54
-      - type: wip
-        value: 0.46
+    - type: bleu
+      value: 65.51
+    - type: cer
+      value: 0.28
+    - type: chrf
+      value: 74.69
+    - type: wer
+      value: 0.39
+    - type: wil
+      value: 0.54
+    - type: wip
+      value: 0.46
+datasets:
+- techiaith/legislation-gov-uk_en-cy
+- techiaith/cofnodycynulliad_en-cy
 ---
 # mt-dspec-legislation-en-cy
 A language translation model for translating between English and Welsh, specialised to the specific domain of Legislation.
@@ -78,4 +84,4 @@ translated = translate(
   "curriculum used up until that point."
 )
 print(translated["translation_text"])
-```
+```