docs(bootstrap-template): update bootstrap template link (#33892)

### Issue # (if applicable)

Closes #33738.

### Reason for this change

Bootstrap template location moved from `aws-cdk` to `aws-cdk-cli`.

### Description of changes

Updated the link to the bootstrap template.

### Describe any new or updated permissions being added

None


### Description of how you validated changes

Verified link is valid.

### 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: evzzk

design/cdk-bootstrap.md

@@ -326,4 +326,4 @@ This should make sure the CFN update succeeds.
 ## Bootstrap template
 
 The bootstrap template used by the CLI command can be found in the
-[aws-cdk package](../packages/aws-cdk/lib/api/bootstrap/bootstrap-template.yaml).
+[`aws-cdk-cli` package](https://github.com/aws/aws-cdk-cli/blob/main/packages/aws-cdk/lib/api/bootstrap/bootstrap-template.yaml).

packages/@aws-cdk/app-staging-synthesizer-alpha/README.md

@@ -169,7 +169,7 @@ These credentials must have the ability to perform CloudFormation calls,
 lookup resources in your account, and perform CloudFormation deployment.
 For a full list of what is necessary, see `LookupRole`, `DeploymentActionRole`,
 and `CloudFormationExecutionRole` in the
-[bootstrap template](https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk/lib/api/bootstrap/bootstrap-template.yaml).
+[bootstrap template](https://github.com/aws/aws-cdk-cli/blob/main/packages/aws-cdk/lib/api/bootstrap/bootstrap-template.yaml).
 
 ```ts
 import { BucketEncryption } from 'aws-cdk-lib/aws-s3';