fix: update links to https://github.com/google/generative-ai-docs in the readme (#129)

* Update links to https://github.com/google/generative-ai-docs

* Update links to https://github.com/google/generative-ai-docs

Author: mpursley

README.md

@@ -134,15 +134,15 @@ response.reply("Can you tell me a joke?")
 
 - [General PaLM documentation](https://ai.google.dev/docs/palm_api_overview)
 
-- [Text quickstart](https://github.com/google/generative-ai-docs/tree/main/site/en/tutorials/text_quickstart.ipynb)
+- [Text quickstart](https://github.com/google/generative-ai-docs/blob/main/site/en/palm_docs/text_quickstart.ipynb)
 
-- [Chat quickstart](https://github.com/google/generative-ai-docs/tree/main/site/en/tutorials/chat_quickstart.ipynb)
+- [Chat quickstart](https://github.com/google/generative-ai-docs/blob/main/site/en/palm_docs/chat_quickstart.ipynb)
 
-- [Tuning quickstart](https://github.com/google/generative-ai-docs/blob/main/site/en/tutorials/tuning_quickstart_python.ipynb)
+- [Tuning quickstart](https://github.com/google/generative-ai-docs/blob/main/site/en/palm_docs/tuning_quickstart_python.ipynb)
 
 ### Colab magics
 
-Once installed, use the Python client via the `%%palm` Colab magic. Read the [full guide](https://github.com/google/generative-ai-docs/blob/main/site/en/tools/notebook_magic.ipynb).
+Once installed, use the Python client via the `%%palm` Colab magic. Read the [full guide](https://github.com/google/generative-ai-docs/blob/main/site/en/palm_docs/notebook_magic.ipynb).
 
 ```
 %%palm