doc: Update README.md to notify of migration (#1002)

* ensure users are aware of move
* add notes about how to update upstream links in git remote

README.md

@@ -21,6 +21,9 @@
 [![Downloads](https://pepy.tech/badge/garak/month)](https://pepy.tech/project/garak)
 
 
+"🚧 garak is moving. This repository is moving to the `NVIDIA` github organization in the near future. This is planned to be a non-disruptive transition with automatic redirection. 🚧" 
+
+
 ## Get started
 ### > See our user guide! [docs.garak.ai](https://docs.garak.ai/)
 ### > Join our [Discord](https://discord.gg/uVch4puUCs)!
@@ -75,6 +78,13 @@ python -m pip install -e .
 
 OK, if that went fine, you're probably good to go!
 
+**Note**: if you cloned before the move to the `NVIDIA` GitHub organisation, but you're reading this at the `github.com/NVIDIA` URI, please update your remotes as follows:
+
+```
+git remote set-url origin https://github.com/NVIDIA/garak.git
+```
+
+
 ## Getting started
 
 The general syntax is:
@@ -223,7 +233,7 @@ For testing. This generator repeats back the prompt it received.
 | Probe | Description |
 | --- | --- |
 | blank | A simple probe that always sends an empty prompt. |
-| atkgen | Automated Attack Generation. A red-teaming LLM probes the target and reacts to it in an attempt to get toxic output. Prototype, mostly stateless, for now uses a simple GPT-2 [fine-tuned](https://huggingface.co/leondz/artgpt2tox) on the subset of hhrlhf attempts that yielded detectable toxicity (the only target currently supported for now). |
+| atkgen | Automated Attack Generation. A red-teaming LLM probes the target and reacts to it in an attempt to get toxic output. Prototype, mostly stateless, for now uses a simple GPT-2 [fine-tuned](https://huggingface.co/garak-llm/artgpt2tox) on the subset of hhrlhf attempts that yielded detectable toxicity (the only target currently supported for now). |
 | av_spam_scanning | Probes that attempt to make the model output malicious content signatures |
 | continuation | Probes that test if the model will continue a probably undesirable word |
 | dan | Various [DAN](https://adguard.com/en/blog/chatgpt-dan-prompt-abuse.html) and DAN-like attacks |