Increase task-runner memory request & limit

The task-runner is used to run rails console,
so it would occasionally require significant memory
to load the rails app.

scripts/review_apps/base-config.yaml

@@ -67,10 +67,10 @@ gitlab:
     resources:
       requests:
         cpu: 300m
-        memory: 800M
+        memory: 1927M
       limits:
         cpu: 450m
-        memory: 2000M
+        memory: 2890M
   webservice:
     resources:
       requests: