8.6: followup to 7365

[oliver-sanders]

Pending agreement of #7325 (comment), the Jinja2 deprecation notice, currently flagging version 8.7 will need to be amended as some (but not all) deprecated interfaces will be supported until 8.8.0

See also:

• Jinja2: catch and log warnings #7365
• 8.7: followup to 7365 #7368