Remove depricated job_template_name in README

[neevnuv]

The following spec options have been depricated from JobTemplates: JobTemplates:

• job_template_name
• job_template_project
• job_template_playbook
• job_template_inventory

This PR changes them to the newer version the README.

[neevnuv]

This PR is ready for review 😁

1. I think the https://github.com/ansible/awx-resource-operator/?tab=readme-ov-file#get-involved in the README should be aligned with the awx-operator and awx in a future PR.
2. Maybe in a future PR we should add a documentation that goes through the CRDs of the resource operator and shows examples of deploying each one. Like the ones in Usage paragraphs in the README on AnsibleJobs and Job.Template

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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