Update downloads.py current release (#7541)

Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

utils/downloads.py

@@ -69,7 +69,7 @@ def attempt_download(file, repo='ultralytics/yolov5'):  # from utils.downloads i
             try:
                 tag = subprocess.check_output('git tag', shell=True, stderr=subprocess.STDOUT).decode().split()[-1]
             except Exception:
-                tag = 'v6.0'  # current release
+                tag = 'v6.1'  # current release
 
         if name in assets:
             safe_download(