maintaining multiple API versions with AWS Lambda and API Gateway

Question

I am trying to implement versioning on my API's. The aim is to have different URL endpoints for two different API versions which point to 2 different versions of my lambda.

Solution I can think of is to have 2 API endpoints Example :

1. https://abcd.aws.com/v1 - GET method
2. https://abcd.aws.com/v2 - GET method

serverless.yml

service: versions

provider:
  name: aws
  runtime: python3.7
  versionFunctions: false
  stage: ${opt:stage, 'dev'}
  region: us-east-1
  timeout: 30
  memorySize: 256
  deploymentBucket: ${ssm:${self:service}/${self:provider.stage}/sls/deployment/bucket}
  role: ${ssm:${self:service}/${self:provider.stage}/lambda/role}
  apiName: ${self:service}-api-${self:provider.stage}
  vpc:
    securityGroupIds:
      - ${ssm:${self:service}/${self:provider.stage}/lambda/sgId}
    subnetIds:
      - ${ssm:${self:service}/${self:provider.stage}/lambda/subnetA}

custom:
  serverless-layers:
    functions:
      - hello-lambda
    dependenciesPath: ./requirements.txt

  standardResponseHeaders:
    'Access-Control-Allow-Origin': "'*'"
    'Access-Control-Allow-Credentials': "'true'"
    'Access-Control-Allow-Headers': "'*'"

plugins:
  - serverless-layers
  - serverless-plugin-multiple-responses
  - serverless-api-stage

package:
  individually: true
  exclude:
    - '**/*'
    - serverless.yaml

functions:
  hello-lambda: ${file(config/functions/hello-lambda.yml):function1}

My lambda function

import os
import json
import logging
logger = logging.getLogger()
logger.setLevel(logging.INFO)

def handler(event, context):
    logger.info("Event: {}".format(json.dumps(event)))
    response = {
        "statusCode": 200,
        "body": "Hello from the {}!".format(os.environ.get('SERVICE_NAME'))
    }
    return response

Within my serverless.yml have 2 different function templates, like

function1:
  handler: src/helloLambda.handler
  name: ${self:service}-hello-lambda-${self:provider.stage}
  description: testing API versioning - ${self:provider.stage}
  events:
    - http:
        path: /hello/lambda/v1
        method: GET
        integration: lambda

function2:
  handler: src/helloLambda.handler
  name: ${self:service}-hello-lambda-${self:provider.stage}
  description: testing API versioning - ${self:provider.stage}
  events:
    - http:
        path: /hello/lambda/v2
        method: GET
        integration: lambda

You can see in both my function templates, I am pointing it to the same lambda function. How can change that to point to the same lambda with a different version?