fix: remove comments from packages.txt, fix libgl1 package name

packages.txt

@@ -1,7 +1,5 @@
-# System packages installed via apt before pip
-# Required by opencv-python-headless on HF Spaces Ubuntu base image
-libgl1-mesa-glx
+libgl1
 libglib2.0-0
 libsm6
 libxext6
-libxrender-dev
+libxrender1