Update arena_config.py

Added Gemma 2, 2B 8-bit

arena_config.py

@@ -34,6 +34,7 @@ APPROVED_MODELS = [
     ("llama3.2:3b-instruct-q4_K_M", "LLaMA 3.2 (3B, 4-bit)"),
     ("llama3.1:8b-instruct-q4_0", "LLaMA 3.1 (8B, 4-bit)"),
     ("gemma2:2b-instruct-q4_0", "Gemma 2 (2B, 4-bit)"),
+    ("gemma2:2b-instruct-q8_0", "Gemma 2 (2B, 8-bit)"),
     ("gemma2:9b-instruct-q4_0", "Gemma 2 (9B, 4-bit)"),
     ("qwen2.5:0.5b-instruct-q8_0", "Qwen 2.5 (0.5B, 8-bit)"),
     ("qwen2.5:1.5b-instruct-q8_0", "Qwen 2.5 (1.5B, 8-bit)"),