augment timeout on POST to FC to 10 seconds (fixes #21596)

src/authentic2_auth_fc/views.py

@@ -89,7 +89,7 @@ def resolve_access_token(authorization_code, redirect_uri, logger):
         response = requests.post(
             app_settings.token_url, data=data,
             verify=app_settings.verify_certificate,
-            allow_redirects=False, timeout=3)
+            allow_redirects=False, timeout=10)
         if response.status_code != 200:
             try:
                 data = response.json()