docs: Update static docker docs to include inventory update script usage

[Haroon-Khel]

• [x] commit message has one of the standard prefixes
• [ ] faq.md updated if appropriate
• [ ] other documentation is changed or added (if applicable)
• [ ] playbook changes run through VPC or QPC (if you have access)
• [x] VPC/QPC not applicable for this PR
• [ ] for inventory.yml changes, bastillion/nagios/jenkins updated accordingly

ref https://github.com/adoptium/infrastructure/issues/3415

Like the inventory.yml file, I recommend updating the DockerInventory.json via manual prs using the script (until I find a way to automate the automation 😄 )