Pull-Request-Example fails on creating ApprovalRuleTemplate

[mleziva]

When running CDK deploy from master with on the Pull-Request-Example, the cloud formation times out and rollsback on creation of the Approval Rule Template custom resource.

Repro steps:

• Clone master branch
• Copy pull-request-example folder to new folder
• run npm install
• Install cdkdx and run cdk build
• Run cdk deploy and approve changes

Error in the custom function:

2023-03-17T17:00:14.796Z	undefined	ERROR	Uncaught Exception 	
{
    "errorType": "Runtime.UserCodeSyntaxError",
    "errorMessage": "SyntaxError: Unexpected token '?'",
    "stack": [
        "Runtime.UserCodeSyntaxError: SyntaxError: Unexpected token '?'",
        "    at _loadUserApp (/var/runtime/UserFunction.js:98:13)",
        "    at Object.module.exports.load (/var/runtime/UserFunction.js:140:17)",
        "    at Object.<anonymous> (/var/runtime/index.js:43:30)",
        "    at Module._compile (internal/modules/cjs/loader.js:999:30)",
        "    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)",
        "    at Module.load (internal/modules/cjs/loader.js:863:32)",
        "    at Function.Module._load (internal/modules/cjs/loader.js:708:14)",
        "    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12)",
        "    at internal/main/run_main_module.js:17:47"
    ]
}