fix double slash in src_dir

Co-authored-by: Copilot <[email protected]>

Author: yungwine

modules/btc_teleport.py

@@ -17,7 +17,7 @@ def __init__(self, ton, local, *args, **kwargs):
         super().__init__(ton, local, *args, **kwargs)
         self.keystore_path = self.ton.local.buffer.my_work_dir + '/btc_oracle_keystore'
         self.repo_name = 'ton-teleport-btc-periphery'
-        self.src_dir = '/usr/src/' + f'/{self.repo_name}'
+        self.src_dir = f"/usr/src/{self.repo_name}"
         self.bin_dir = self.src_dir + '/out'
 
     def create_local_file(self):