Update generation config with word-level alignment heads

generation_config.json

@@ -1,4 +1,26 @@
 {
+  "alignment_heads": [
+    [
+      3,
+      3
+    ],
+    [
+      4,
+      7
+    ],
+    [
+      5,
+      1
+    ],
+    [
+      5,
+      5
+    ],
+    [
+      5,
+      7
+    ]
+  ],
   "begin_suppress_tokens": [
     220,
     50256
@@ -110,5 +132,5 @@
     50360,
     50361
   ],
-  "transformers_version": "4.27.0.dev0"
+  "transformers_version": "4.31.0.dev0"
 }