Increase server startup timeout

Moving to Windows 11 seems to have increased the rate of intermittent failures here,
experiment with a longer timeout to see if it helps.

Differential Revision: https://phabricator.services.mozilla.com/D188808

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1826982
gecko-commit: a2a9e360d5cb4e2433e873a233f1cfe74f1098d2
gecko-reviewers: Sasha
diff --git a/tools/wptrunner/wptrunner/environment.py b/tools/wptrunner/wptrunner/environment.py
index 5168211..de96f79 100644
--- a/tools/wptrunner/wptrunner/environment.py
+++ b/tools/wptrunner/wptrunner/environment.py
@@ -264,7 +264,7 @@
 
     def ensure_started(self):
         # Pause for a while to ensure that the server has a chance to start
-        total_sleep_secs = 30
+        total_sleep_secs = 60
         each_sleep_secs = 0.5
         end_time = time.time() + total_sleep_secs
         while time.time() < end_time: