Consider using true/false for all booleans in docs

[kristianheljas]

Based on the community decision to use true/false for boolean values in documentation and examples, we ask that you evaluate booleans in this collection and consider changing any that do not use true/false (lowercase).

See documentation block format for more info (specifically, option defaults).

If you have already implemented this or decide not to, feel free to close this issue.

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P.S. This is auto-generated issue, please raise any concerns here

[dux-fortinet]

FortiManager Ansible Collection don't have this issues. Thanks for pointing out.

[dux-fortinet]

All True/Flase boolean values in documentation and examples are changed to the true/false in FortiManager Ansible 2.4.0