missing requirements.txt dependency
fixes the following issue:
```
[2024-06-04 22:26] Traceback (most recent call last):
File "/workspace/comfyui_launcher_projects/comfyui-strimmlarns-aesthetic-score/comfyui/nodes.py", line 1879, in load_custom_node
module_spec.loader.exec_module(module)
File "<frozen importlib._bootstrap_external>", line 883, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "/workspace/comfyui_launcher_projects/comfyui-strimmlarns-aesthetic-score/comfyui/custom_nodes/Endless-Nodes/__init__.py", line 7, in <module>
from .endless_nodes import *
File "/workspace/comfyui_launcher_projects/comfyui-strimmlarns-aesthetic-score/comfyui/custom_nodes/Endless-Nodes/endless_nodes.py", line 52, in <module>
import ImageReward as RM
ModuleNotFoundError: No module named 'ImageReward'
```
Updating the requirements.txt file to manually add the requirements for the CLIP module from OpenAI. Manual instructions for install from their web page are here:
https://github.com/openai/CLIP#usage