chore(custom-resources): fix broken links (#25505)

Closes #<[25503](#25503)>

----

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

Author: khushail

packages/aws-cdk-lib/custom-resources/README.md

@@ -314,8 +314,8 @@ This module includes a few examples for custom resource implementations:
 
 Provisions an object in an S3 bucket with textual contents. See the source code
 for the
-[construct](https://github.com/aws/aws-cdk/blob/main/packages/%40aws-cdk/custom-resources/test/provider-framework/integration-test-fixtures/s3-file.ts) and
-[handler](https://github.com/aws/aws-cdk/blob/main/packages/%40aws-cdk/custom-resources/test/provider-framework/integration-test-fixtures/s3-file-handler/index.ts).
+[construct](https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/custom-resources/test/provider-framework/integration-test-fixtures/s3-file.ts) and
+[handler](https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/custom-resources/test/provider-framework/integration-test-fixtures/s3-file-handler/index.ts).
 
 The following example will create the file `folder/file1.txt` inside `myBucket`
 with the contents `hello!`.
@@ -344,7 +344,7 @@ This sample demonstrates the following concepts:
 
 #### S3Assert
 
-Checks that the textual contents of an S3 object matches a certain value. The check will be retried for 5 minutes as long as the object is not found or the value is different. See the source code for the [construct](test/provider-framework/integration-test-fixtures/s3-assert.ts) and [handler](test/provider-framework/integration-test-fixtures/s3-assert-handler/index.py).
+Checks that the textual contents of an S3 object matches a certain value. The check will be retried for 5 minutes as long as the object is not found or the value is different. See the source code for the [construct](https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/custom-resources/test/provider-framework/integration-test-fixtures/s3-assert.ts) and [handler](https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/custom-resources/test/provider-framework/integration-test-fixtures/s3-assert-handler/index.py).
 
 The following example defines an `S3Assert` resource which waits until
 `myfile.txt` in `myBucket` exists and includes the contents `foo bar`: