Update Angular Amplify Gen 2 docs

### Environment information

```plain text
System:
OS: Windows 11 10.0.26120
CPU: (20) x64 12th Gen Intel(R) Core(TM) i7-12700H
Memory: 1.14 GB / 15.71 GB
Binaries:
Node: 20.12.0 - C:\Program Files\nodejs\node.EXE
Yarn: 1.22.19 - ~\AppData\Roaming\npm\yarn.CMD
npm: 10.8.0 - C:\Program Files\nodejs\npm.CMD
pnpm: undefined - undefined
NPM Packages:
@aws-amplify/backend: 1.0.0
@aws-amplify/backend-cli: 1.0.1
aws-amplify: 6.3.2
aws-cdk: 2.140.0
aws-cdk-lib: 2.140.0
typescript: 5.4.5
AWS environment variables:
AWS_NODEJS_CONNECTION_REUSE_ENABLED = 1
AWS_SDK_LOAD_CONFIG = 1
AWS_STS_REGIONAL_ENDPOINTS = regional
No CDK environment variables
```

### Description

While attempting to connect to a DynamoDB I noticed the Amplify Gen 2 Angular Data docs are written for React.
[https://docs.amplify.aws/angular/build-a-backend/data/set-up-data/](https://docs.amplify.aws/angular/build-a-backend/data/set-up-data/)
This has added a lot of time to the dev process and having the docs target Angular specifically would be much appreciated.