Fix task runtime platform

Author: farski

theworld/terra/templates/apps/wordpress.yml

@@ -420,6 +420,9 @@ Resources:
       NetworkMode: awsvpc
       RequiresCompatibilities:
         - FARGATE
+      RuntimePlatform:
+        CpuArchitecture: ARM64
+        OperatingSystemFamily: LINUX
       Tags:
         - { Key: prx:meta:tagging-version, Value: "2021-04-07" }
         - { Key: prx:cloudformation:stack-name, Value: !Ref AWS::StackName }