docs(ssm): doc for grantRead in IParameter is missing GetParameters (#…

…27867)

The doc for `grantRead` in `IParameter` is missing `GetParameters`.

The `grantRead` actually grants 'ssm:GetParameters'.

```ts
    return iam.Grant.addToPrincipal({
      grantee,
      actions: [
        'ssm:DescribeParameters',
        'ssm:GetParameters',
        'ssm:GetParameter',
        'ssm:GetParameterHistory',
      ],
```

https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/aws-ssm/lib/parameter.ts#L181-L186

----

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packages/aws-cdk-lib/aws-ssm/lib/parameter.ts

@@ -33,7 +33,7 @@ export interface IParameter extends IResource {
   readonly parameterType: string;
 
   /**
-   * Grants read (DescribeParameter, GetParameter, GetParameterHistory) permissions on the SSM Parameter.
+   * Grants read (DescribeParameter, GetParameters, GetParameter, GetParameterHistory) permissions on the SSM Parameter.
    *
    * @param grantee the role to be granted read-only access to the parameter.
    */