fix(server): update server url when the port change (jxmorris12#210)

Author: mdevolde

CHANGELOG.md

@@ -32,6 +32,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/2.0.0/),
 
 ### Fixed
 - Corrected a bug in `language_tool_python.config_file.LanguageToolConfig` where directory paths were incorrectly rejected by the path validator.
+- Fixed a bug in `LanguageTool._start_server_on_free_port` where `_url` was not updated when retrying on a different port, causing all subsequent server requests to target the wrong (original) port.
 
 ### Removed
 - **Breaking:** Removed all functions and classes previously deprecated in v3.3.0:

src/language_tool_python/server.py

@@ -1101,6 +1101,7 @@ def _start_server_on_free_port(self) -> None:
                 if len(self._available_ports) > 0:
                     old_port = self._port
                     self._port = self._available_ports.pop()
+                    self._url = f"http://{self._host}:{self._port}/v2/"
                     logger.debug("Port %s failed, trying port %s", old_port, self._port)
                 else:
                     raise