Update model.py

missing an ' character

model.py

@@ -1,5 +1,5 @@
 import os
-str_cmd1 = 'pip install "unsloth[colab-new] @ git+https://github.com/unslothai/unsloth.git"
+str_cmd1 = 'pip install "unsloth[colab-new] @ git+https://github.com/unslothai/unsloth.git"'
 str_cmd2 = 'pip install --no-deps xformers "trl<0.9.0" peft accelerate bitsandbytes'
 os.system(str_cmd1)
 os.system(str_cmd2)