Update generation config with word-level alignment heads

generation_config.json

@@ -1,4 +1,30 @@
 {
+  "alignment_heads": [
+    [
+      13,
+      15
+    ],
+    [
+      15,
+      4
+    ],
+    [
+      15,
+      15
+    ],
+    [
+      16,
+      1
+    ],
+    [
+      20,
+      0
+    ],
+    [
+      23,
+      4
+    ]
+  ],
   "begin_suppress_tokens": [
     220,
     50257
@@ -216,5 +242,5 @@
     "transcribe": 50359,
     "translate": 50358
   },
-  "transformers_version": "4.27.0.dev0"
-}
+  "transformers_version": "4.31.0.dev0"
+}