Can't create URL map

##### SUMMARY
Following this [manual](https://docs.ansible.com/ansible/latest/collections/google/cloud/gcp_compute_url_map_module.html) I can't create URL map

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME

google.cloud.gcp_compute_url_map
##### ANSIBLE VERSION

```
2.12.8

```

##### COLLECTION VERSION

```
google.cloud 1.0.2

```

##### OS / ENVIRONMENT

Linux elementary OS 6.1 Jólnir

##### STEPS TO REPRODUCE

```- name: create a URL map
google.cloud.gcp_compute_url_map:
name: 'urlmap-forwardingrule-path_matcher'
project: '{{ gcp_project }}'
auth_kind: '{{ gcp_cred_kind }}'
path_matchers:
- name: '{{ instance_name }}'

- path_rules:
- paths:
- '/'
- '/*'
- service: '{{ backendservice }}'
service_account_file: "{{ gcp_cred_file }}"
state: present

```

##### EXPECTED RESULTS

Url Map is created

##### ACTUAL RESULTS

Got an error

```TASK [gcloud/create_lb : create a URL map] ***********************************************************************************
fatal: [localhost]: FAILED! => {"changed": false, "msg": "missing required arguments: name found in path_matchers"}

```

Start with the gcp_compute_url_map module documentation and reproduce the supplied playbook using the reported Ansible and google.cloud versions. Inspect the path_matchers argument requirements and determine why the example produces the missing-name error. Done means the playbook creates the URL map successfully without that validation error.

Written by the indexing model from the issue text.