Update app.py

app.py

@@ -1,6 +1,5 @@
-%cd /content/segment-anything-2
-
 import os
+os.chdir("segment-anything-2")
 import urllib.request
 
 model_urls = {
@@ -65,7 +64,7 @@ from termcolor import colored  # for colored text output
 %matplotlib inline
 %config InlineBackend.figure_format='retina'
 
-%cd /content/segment-anything-2
+os.chdir("segment-anything-2")
 
 from sam2.build_sam import build_sam2
 from sam2.sam2_image_predictor import SAM2ImagePredictor