fix(playbooks): Support wkhtmltox arm64 architecture

[ceefour]

For Ubuntu 20.04 LTS and later

What type of a PR is this?

• Bug Fix

---

Please provide enough information so that others can review your pull request:

Support wkhtmltox arm64 architecture, which is supported starting 0.12.6.

Additionally, it's recommended to update to 0.12.6 for all architectures: frappe/easy_install#24

---

Explain the details for making this change. What existing problem does the pull request solve? The following checklist could help

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you lint your code locally prior to submission?
• Have you successfully run tests with your changes locally?
• Does your commit message have an explanation for your changes and why you'd like us to include them?

---

To support environments such as AWS Graviton1 & Graviton2.

Screenshots/GIFs

[gavindsouza]

@ceefour Please address my concerns on the linked Issue so that we can understand the necessity of this fix and get it merged.

[ceefour]

@gavindsouza replied: frappe/easy_install#24