updated the execution time of semaphore build to 3 hours

Author: Ganesh Datta

.semaphore/semaphore.yml

@@ -14,7 +14,7 @@ fail_fast:
     when: "true"
 
 execution_time_limit:
-  hours: 1
+  hours: 3
 
 queue:
   - when: "branch != 'master' and branch !~ '[0-9]+\\.[0-9]+\\.x'"