Fix deprecated model reference and correct typo (#199)

* Fix typo in tts tutorial

* remove deprecated nlp model and add nmt

Author: rmittal-github

Language-Scaling/Mandarin/asr-finetune-conformer-ctc-nemo-zh.ipynb

@@ -26,7 +26,8 @@
     "\n",
     "- Automated speech recognition (ASR). \n",
     "- Text-to-Speech synthesis (TTS). \n",
-    "- A collection of natural language processing (NLP) services, such as named entity recognition (NER), punctuation, and intent classification.\n",
+    "- Neural Machine Translation (NMT). \n",
+    "- Natural language processing (NLP) punctuation service.\n",
     "\n",
     "In this tutorial, we will fine-tune a Riva ASR acoustic model with NeMo. <br> \n",
     "To understand the basics of Riva ASR APIs, refer to [Getting started with Riva ASR in Python](https://github.com/nvidia-riva/tutorials/blob/stable/asr-basics.ipynb). <br>\n",

tts-basics-customize-ssml.ipynb

@@ -64,8 +64,8 @@
    "outputs": [],
    "source": [
     "# We need numpy to read the output from the Riva TTS request.\n",
-    "!pip install numpy\n",
-    "!pip install nvidia-riva-client"
+    "pip install numpy\n",
+    "pip install nvidia-riva-client"
    ]
   },
   {