docs: micro doc update with a helpful reminder on environment variables (#20)

Author: SahilJain314

docs/guides/grpo.md

@@ -10,6 +10,8 @@ uv run examples/run_grpo_math.py --config <PATH TO YAML CONFIG> {overrides}
 ```
 If not specified, `config` will default to [examples/configs/grpo.yaml](../../examples/configs/grpo.yaml)
 
+**Reminder**: Don't forget to set your HF_HOME and WANDB_API_KEY (if needed). You'll need to do a `huggingface-cli login` as well for Llama models.
+
 ## Now, for the details:
 
 In this guide, we'll walk through we handle

docs/guides/sft.md

@@ -21,6 +21,7 @@ uv run examples/run_sft.py \
     cluster.gpus_per_node=1 \
     logger.wandb.name="sft-dev-1-gpu"
 ```
+**Reminder**: Don't forget to set your HF_HOME and WANDB_API_KEY (if needed). You'll need to do a `huggingface-cli login` as well for Llama models.
 
 ## Datasets