Update Visual Studio manifest url to the latest version

Author: Delphier

signtool.py

@@ -23,7 +23,7 @@ def get_msi_cabs(msi):
 def get_sub_dirs(path):
 	return [x for x in path.iterdir() if x.is_dir()]
 
-MANIFEST_URL = "https://aka.ms/vs/17/release/channel"
+MANIFEST_URL = "https://aka.ms/vs/stable/channel"
 print("Checking Visual Studio Manifest...")
 chman = json.loads(download(MANIFEST_URL))
 vsman_url = chman["channelItems"][0]["payloads"][0]["url"]