[BUG] [typescript-angular] syntax error in *.service.ts files when using isDateTime=true

Created by: tomanak500

Bug Report Checklist

Have you provided a full/minimal spec to reproduce the issue?
Have you validated the input using an OpenAPI validator (example)?
Have you tested with the latest master to confirm the issue still exists?
Have you searched for related issues/PRs?
What's the actual output vs expected output? -- actual output - httpParams = httpParams.append(key, (value as Date).toISOString(); -- expected output - httpParams = httpParams.append(key, (value as Date).toISOString());
[Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

I am using typescript-angular generator with option "isDateTime" turned on. Resulting service classes contains syntax error in function addToHttpParamsRecursive:

               if (key != null) {
                    httpParams = httpParams.append(key,
                        (value as Date).toISOString();
                } else {
                   throw Error("key may not be null if value is Date");
                }

There is missing closing parenthesis after toISOString().

openapi-generator version

5.3.0

OpenAPI declaration file content or url

Generation Details

Steps to reproduce

call generator-cli with additional-properties isDateTime=true:

openapi-generator-cli generate -g typescript-angular -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml -o src/app/pet-store-api --additional-properties=isDateTime=true

Related issues/PRs

the error is there since new code introduced in https://github.com/OpenAPITools/openapi-generator/issues/4404 similar to https://github.com/OpenAPITools/openapi-generator/issues/6602

Suggest a fix

Modify file api.service.mustache Move closing parenthesis after the conditional {{^isDateTime}}