reload config file when hitting a config route

pyheatpump/config.py

@@ -103,6 +103,7 @@ async def set_config(request):
     return PlainTextResponse('OK')
 
 async def config_route(request, *args, **kwargs):
+    config.read(filenames=CONFIG_FILES)
     if request['method'] == 'GET':
         return await get_config(request)
     elif request['method'] == 'POST':
@@ -114,6 +115,7 @@ def get_mac():
 
 
 async def mac_route(request, *args, **kwargs):
+    config.read(filenames=CONFIG_FILES)
     if request['method'] == 'GET':
         return PlainTextResponse(get_mac())
     elif request['method'] == 'POST':