chore(codebuild): fix the comment at CodeBuildImage.AMAZON_LINUX_2_ARM_3 (#30670)

### Description of changes

Fixed typo in the comment at CodeBuildImage.AMAZON_LINUX_2_ARM_3.

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: Tietew

packages/aws-cdk-lib/aws-codebuild/lib/project.ts

@@ -1843,7 +1843,7 @@ export class LinuxBuildImage implements IBuildImage {
    * */
   public static readonly AMAZON_LINUX_2_ARM_2 = LinuxArmBuildImage.AMAZON_LINUX_2_STANDARD_2_0;
   /**
-   * Image "aws/codebuild/amazonlinux2-aarch64-standard:2.0".
+   * Image "aws/codebuild/amazonlinux2-aarch64-standard:3.0".
    * @see {LinuxArmBuildImage.AMAZON_LINUX_2_STANDARD_3_0}
    * */
   public static readonly AMAZON_LINUX_2_ARM_3 = LinuxArmBuildImage.AMAZON_LINUX_2_STANDARD_3_0;