chore(servicediscovery): rename docs/test props (#20639)

It was noticed that 'covfefe' is a potentially charged word. This is a
straightforward PR to rename instances of 'covfefe' to something less
politically adjacent.

Please see comment here: https://twitter.com/bryson3gps/status/1533880885015093248

----

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packages/@aws-cdk/aws-servicediscovery/test/integ.service-with-http-namespace.lit.ts

@@ -5,7 +5,7 @@ const app = new cdk.App();
 const stack = new cdk.Stack(app, 'aws-servicediscovery-integ');
 
 const namespace = new servicediscovery.HttpNamespace(stack, 'MyNamespace', {
- name: 'covfefe',
+ name: 'MyHTTPNamespace',
 });
 
 const service1 = namespace.createService('NonIpService', {

packages/@aws-cdk/aws-servicediscovery/test/service-with-http-namespace.lit.integ.snapshot/aws-servicediscovery-integ.template.json

@@ -3,7 +3,7 @@
  "MyNamespaceD0BB8558": {
  "Type": "AWS::ServiceDiscovery::HttpNamespace",
  "Properties": {
- "Name": "covfefe"
+ "Name": "MyHTTPNamespace"
  }
  },
  "MyNamespaceNonIpService3B425009": {

packages/@aws-cdk/aws-servicediscovery/test/service-with-http-namespace.lit.integ.snapshot/tree.json

@@ -26,7 +26,7 @@
  "attributes": {
  "aws:cdk:cloudformation:type": "AWS::ServiceDiscovery::HttpNamespace",
  "aws:cdk:cloudformation:props": {
- "name": "covfefe"
+ "name": "MyHTTPNamespace"
  }
  },
  "constructInfo": {