Add `opus-mt-tc` tag

Add `opus-mt-tc` tag so that this new marian models can be found more easily

README.md

@@ -2,10 +2,9 @@
 language:
 - en
 - lv
-
 tags:
 - translation
-
+- opus-mt-tc
 license: cc-by-4.0
 model-index:
 - name: opus-mt-tc-big-lv-en
@@ -19,9 +18,9 @@ model-index:
       type: flores_101
       args: lav eng devtest
     metrics:
-       - name: BLEU
-         type: bleu
-         value: 37.2
+    - name: BLEU
+      type: bleu
+      value: 37.2
   - task:
       name: Translation lav-eng
       type: translation
@@ -31,9 +30,9 @@ model-index:
       type: newsdev2017
       args: lav-eng
     metrics:
-       - name: BLEU
-         type: bleu
-         value: 30.8
+    - name: BLEU
+      type: bleu
+      value: 30.8
   - task:
       name: Translation lav-eng
       type: translation
@@ -43,9 +42,9 @@ model-index:
       type: tatoeba_mt
       args: lav-eng
     metrics:
-       - name: BLEU
-         type: bleu
-         value: 59.2
+    - name: BLEU
+      type: bleu
+      value: 59.2
   - task:
       name: Translation lav-eng
       type: translation
@@ -55,9 +54,9 @@ model-index:
       type: wmt-2017-news
       args: lav-eng
     metrics:
-       - name: BLEU
-         type: bleu
-         value: 21.8
+    - name: BLEU
+      type: bleu
+      value: 21.8
 ---
 # opus-mt-tc-big-lv-en