docs: fix "a origin" to "an origin" and "a instance" to "an instance"

Fix incorrect indefinite article before words starting with vowel
sounds: "origin" and "instance" both start with vowel sounds and
require "an".

Author: syukawa-dev

packages/aws-cdk-lib/aws-cloudfront-origins/lib/function-url-origin.ts

@@ -42,7 +42,7 @@ export interface FunctionUrlOriginProps extends cloudfront.OriginProps {
 }
 
 /**
- * Properties for configuring a origin using a standard Lambda Functions URLs.
+ * Properties for configuring an origin using a standard Lambda Functions URLs.
  */
 export interface FunctionUrlOriginBaseProps extends cloudfront.OriginProps { }
 

packages/aws-cdk-lib/aws-cloudfront-origins/lib/s3-bucket-origin.ts

@@ -26,7 +26,7 @@ const KEY_ACTIONS: Record<string, string[]> = {
 };
 
 /**
- * Properties for configuring a origin using a standard S3 bucket
+ * Properties for configuring an origin using a standard S3 bucket
  */
 export interface S3BucketOriginBaseProps extends cloudfront.OriginProps { }
 

packages/aws-cdk-lib/aws-cloudfront-origins/lib/s3-static-website-origin.ts

@@ -4,7 +4,7 @@ import * as cloudfront from '../../aws-cloudfront';
 import type { IBucket } from '../../aws-s3';
 
 /**
- * Properties for configuring a origin using a S3 bucket configured as a website endpoint
+ * Properties for configuring an origin using a S3 bucket configured as a website endpoint
  */
 export interface S3StaticWebsiteOriginProps extends HttpOriginProps { }
 

packages/aws-cdk-lib/aws-ec2/lib/nat.ts

@@ -84,7 +84,7 @@ export abstract class NatProvider {
    * @see https://docs.aws.amazon.com/vpc/latest/userguide/VPC_NAT_Instance.html
    *
    * @deprecated use instanceV2. 'instance' is deprecated since NatInstanceProvider
-   * uses a instance image that has reached EOL on Dec 31 2023
+   * uses an instance image that has reached EOL on Dec 31 2023
    */
   public static instance(props: NatInstanceProps): NatInstanceProvider {
     return new NatInstanceProvider(props);