bot: Update index path of the decision task

Author: marco-c

bot/code_coverage_bot/hooks/base.py

@@ -54,6 +54,8 @@ def __init__(
         # Load coverage tasks for all platforms
         decision_task_id = taskcluster.get_decision_task(self.branch, self.revision)
 
+        assert decision_task_id is not None, "The decision task couldn't be found"
+
         group = taskcluster.get_task_details(decision_task_id)["taskGroupId"]
 
         test_tasks = [

bot/code_coverage_bot/taskcluster.py

@@ -17,7 +17,7 @@
 
 
 def get_decision_task(branch, revision):
-    route = f"gecko.v2.{branch}.revision.{revision}.firefox.decision"
+    route = f"gecko.v2.{branch}.revision.{revision}.taskgraph.decision"
     index = taskcluster_config.get_service("index")
     try:
         return index.findTask(route)["taskId"]