Update translation paths in cspell to ignore generated words

Author: Jiarui Guo

.vscode/cspell.json

@@ -126,7 +126,7 @@
     "sdk/translation/azure-ai-translation-text/tests/test_break_sentence_async.py",
     "sdk/translation/azure-ai-translation-text/tests/test_translation_async.py",
     "sdk/translation/azure-ai-translation-text/tests/test_transliteration_async.py",
-    "sdk/translation/azure-ai-translation-text/azure/ai/translation/text/_model_base.py",
+    "sdk/translation/azure-ai-translation-text/azure/ai/translation/text/_utils/**",
     "sdk/translation/test-resources.json",
     "eng/**/*.json",
     "eng/*.txt",