Fix - matrix connector proxy config (#2035)

* Fix - matrix connector proxy config

* FIx linting

---------

Co-authored-by: Jacob Tomlinson <jacob@tomlinson.email>

opsdroid/connector/matrix/connector.py

@@ -3,6 +3,7 @@
 import json
 import logging
 import re
+import os
 from pathlib import Path
 from urllib.parse import urlparse
 
@@ -194,6 +195,7 @@ async def connect(self):
             config=config,
             store_path=self.store_path if self._allow_encryption else "",
             device_id=self.device_id,
+            proxy=os.environ.get("HTTPS_PROXY"),
         )
 
         if self.access_token is not None: