submodule: bump openthread from `fa64771` to `4737231`

[dependabot[bot]]

Bumps openthread from fa64771 to 4737231.

Commits

• 4737231 [dnssd] allow Dnssd platform to use native OT mDNS modules (#9944)
• 59572ef [icmp] add OT_ICMP6_ECHO_HANDLER_RLOC_ALOC_ONLY to otIcmp6EchoMode (#10014)
• 4c96151 [logging] fix print format when enabling csl debug (#10045)
• 2199db8 [dataset] simplify AppendMleDatasetTlv() (#10043)
• See full diff in compare view

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