The Jira plugin integration doc will be moved in the next commit, to
"static/generated/integrations/jira/doc.md", as the directory name of
the integration is "jira" in zulip/python-zulip-api.
- Jira integration doc (previously) - "zerver/webhooks/jira/doc.md"
- Jira plugin integration doc (next commit) -
"static/generated/integrations/jira/doc.md"
Both of these will use the same path "jira/doc.md" as their
integration.doc value, and the actual file is loaded based on the order
of template directories listed in computed_settings.py.
Hence, use a custom path for the Jira integration doc to avoid this
collision.
