Update birefnet.py

get home directory for all 3 operating systems
source : https://www.studytonight.com/python-howtos/how-to-get-the-home-directory-in-python

birefnet.py

@@ -7,7 +7,7 @@ import math
 class Config():
     def __init__(self) -> None:
         # PATH settings
-        self.sys_home_dir = os.environ['HOME']     # Make up your file system as: SYS_HOME_DIR/codes/dis/BiRefNet, SYS_HOME_DIR/datasets/dis/xx, SYS_HOME_DIR/weights/xx
+        self.sys_home_dir = os.path.expanduser('~')    # Make up your file system as: SYS_HOME_DIR/codes/dis/BiRefNet, SYS_HOME_DIR/datasets/dis/xx, SYS_HOME_DIR/weights/xx
 
         # TASK settings
         self.task = ['DIS5K', 'COD', 'HRSOD', 'DIS5K+HRSOD+HRS10K', 'P3M-10k'][0]