[Misc] increase the memory limit of the controller-manager (#952)

Signed-off-by: Iceber Gu <[email protected]>

Author: Iceber

config/manager/manager.yaml

@@ -53,7 +53,7 @@ spec:
         resources:
           limits:
             cpu: 500m
-            memory: 256Mi
+            memory: 512Mi
           requests:
             cpu: 10m
             memory: 64Mi