submodule: bump openthread from `afac808` to `24e9306`

[dependabot[bot]]

Bumps openthread from afac808 to 24e9306.

Commits

• 24e9306 [epskc] add API for ePSKc telemetry (#10608)
• e90792d [routing-manager] advertise deprecating RIO prefixes with low preference (#10...
• 697adfd [netdata] centralize service/server TLV logic in Service::Manager (#10624)
• 8a0ea2b [tcat] implement new tcat General commands (#10526)
• See full diff in compare view

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