Update fine-tuning.md

Author: ankumar

docs/fine-tuning.md

@@ -6,6 +6,8 @@
 pip install "skypilot-nightly[gcp]"
 pip install google-api-python-client
 conda install -c conda-forge google-cloud-sdk -y
+conda activate
+sky check
 git clone https://github.com/skypilot-org/skypilot.git
 cd skypilot/llm/axolotl
 # On-demand