adds W&B link to additional resources section

Author: ted-at-openai

README.md

@@ -81,6 +81,7 @@ People are writing great tools and papers for improving outputs from GPT. Here a
 - [Promptify](https://github.com/promptslab/Promptify): A small Python library for using language models to perform NLP tasks.
 - [Scale Spellbook](https://scale.com/spellbook): A paid product for building, comparing, and shipping language model apps.
 - [PromptPerfect](https://promptperfect.jina.ai/prompts): A paid product for testing and improving prompts.
+- [Weights & Biases](https://wandb.ai/site/solutions/llmops): A paid product for tracking model training and prompt engineering experiments.
 
 ### Prompting guides