add link to validation explaination

app.py

@@ -18,7 +18,7 @@ load_dotenv()
 FONT = """<link href="https://fonts.cdnfonts.com/css/jmh-typewriter" rel="stylesheet">"""
 TITLE = """<h1 align="center" id="space-title" class="typewriter">Subnet 6 Leaderboard</h1>"""
 IMAGE = """<a href="https://discord.gg/jqVphNsB4H" target="_blank"><img src="https://i.ibb.co/88wyVQ7/nousgirl.png" alt="nousgirl" style="margin: auto; width: 20%; border: 0;" /></a>"""
-HEADER = """<h2 align="center" class="typewriter"><a href="https://github.com/NousResearch/finetuning-subnet" target="_blank">Subnet 6</a> is a <a href="https://bittensor.com/" target="_blank">Bittensor</a> subnet that incentivizes the creation of the best open models by evaluating submissions on a constant stream of newly generated synthetic GPT-4 data. The models with the best head-to-head loss on the evaluation data receive a steady emission of TAO.</h3>"""
+HEADER = """<h2 align="center" class="typewriter"><a href="https://github.com/NousResearch/finetuning-subnet" target="_blank">Subnet 6</a> is a <a href="https://bittensor.com/" target="_blank">Bittensor</a> subnet that incentivizes the creation of the best open models by evaluating submissions on a constant stream of newly generated synthetic GPT-4 data. The models with the best <a href="https://github.com/NousResearch/finetuning-subnet/blob/master/docs/validator.md" target="_blank">head-to-head loss</a> on the evaluation data receive a steady emission of TAO.</h3>"""
 EVALUATION_DETAILS = """<b>Name</b> is the 🤗 Hugging Face model name (click to go to the model card). <b>Rewards / Day</b> are the expected rewards per day for each model. <b>Last Average Loss</b> is the last loss value on the evaluation data for the model as calculated by a validator (lower is better). <b>UID</b> is the Bittensor user id of the submitter. <b>Block</b> is the Bittensor block that the model was submitted in. More stats on <a href="https://taostats.io/subnets/netuid-6/" target="_blank">taostats</a>."""
 EVALUATION_HEADER = """<h3 align="center">Shows the latest internal evaluation statistics as calculated by a validator run by Nous Research</h3>"""
 VALIDATOR_WANDB_PROJECT = os.environ["VALIDATOR_WANDB_PROJECT"]