docs: update WaveGlow links (#3317)

Signed-off-by: Emmanuel Ferdman <[email protected]>

Author: emmanuel-ferdman

docs/Troubleshooting.md

@@ -76,8 +76,8 @@ Relevant issues: [[#566](https://github.com/pytorch/serve/issues/566)]
 #### How can I resolve model specific python dependency?
 You can provide a requirements.txt while creating a mar file using "--requirements-file/ -r" flag. You can refer to the [waveglow text-to-speech-synthesizer](https://github.com/pytorch/serve/tree/master/examples/text_to_speech_synthesizer) example
 
--   [waveglow mar creation script](https://github.com/pytorch/serve/blob/master/examples/text_to_speech_synthesizer/create_mar.sh)
--   [waveglow handler](https://github.com/pytorch/serve/blob/2d9c7ccc316f592374943a1963c1057bbe232c9e/examples/text_to_speech_synthesizer/waveglow_handler.py#L49)
+-   [waveglow mar creation script](https://github.com/pytorch/serve/blob/master/examples/text_to_speech_synthesizer/WaveGlow/create_mar.sh)
+-   [waveglow handler](https://github.com/pytorch/serve/blob/2d9c7ccc316f592374943a1963c1057bbe232c9e/examples/text_to_speech_synthesizer/WaveGlow/waveglow_handler.py#L49)
 
 Relevant issues: [[#566](https://github.com/pytorch/serve/issues/566)]
 Refer [Torch model archiver cli](https://github.com/pytorch/serve/blob/master/model-archiver/README.md#torch-model-archiver-command-line-interface) for more details.

docs/custom_service.md

@@ -250,7 +250,7 @@ class ModelHandler(BaseHandler):
 
 ```
 
-Refer [waveglow_handler](https://github.com/pytorch/serve/blob/master/examples/text_to_speech_synthesizer/waveglow_handler.py) for more details.
+Refer [waveglow_handler](https://github.com/pytorch/serve/blob/master/examples/text_to_speech_synthesizer/WaveGlow/waveglow_handler.py) for more details.
 
 #### Captum explanations for custom handler
 
@@ -362,7 +362,7 @@ class CustomImageClassifier(ImageClassifier):
 For more details refer following examples :
 - [mnist digit classifier handler](https://github.com/pytorch/serve/tree/master/examples/image_classifier)
 - [Huggingface transformer generalized handler](https://github.com/pytorch/serve/blob/master/examples/Huggingface_Transformers/Transformer_handler_generalized.py)
-- [Waveglow text to speech synthesizer](https://github.com/pytorch/serve/blob/master/examples/text_to_speech_synthesizer/waveglow_handler.py)
+- [Waveglow text to speech synthesizer](https://github.com/pytorch/serve/blob/master/examples/text_to_speech_synthesizer/WaveGlow/waveglow_handler.py)
 
 ## Creating a model archive with an entry point