[build] Improve requirements.txt

requirements.txt

@@ -6,4 +6,4 @@ brotlicffi; implementation_name!='cpython'
 certifi
 requests>=2.31.0,<3
 urllib3>=1.26.17,<3
-secretstorage; sys_platform=='linux' and (implementation_name!='pypy' or python_version>='3.10')
+secretstorage; sys_platform=='linux' and (implementation_name!='pypy' or implementation_version>='7.3.10')

yt_dlp/update.py

@@ -475,7 +475,9 @@ class Updater:
                     f'The requested tag {self.requested_repo}@{update_info.tag} does not exist', True)
             return self._report_network_error(f'fetch updates: {e}', tag=update_info.tag)
 
-        if hashlib.sha256(newcontent).hexdigest() != update_info.checksum:
+        if not update_info.checksum:
+            self._block_restart('Automatically restarting into unverified builds is disabled for security reasons')
+        elif hashlib.sha256(newcontent).hexdigest() != update_info.checksum:
             return self._report_network_error('verify the new executable', tag=update_info.tag)
 
         try: