Doc: fix cache dir sync_max_write record name

[masaori335]

The records.yaml docs listed proxy.config.cache.dir.sync_max_writes (plural), but the actual registered record is sync_max_write (singular).

trafficserver/src/records/RecordsConfig.cc

Line 874 in 464c613

{RECT_CONFIG, "proxy.config.cache.dir.sync_max_write", RECD_INT, "2097152", RECU_DYNAMIC, RR_NULL, RECC_NULL, nullptr, RECA_NULL}

[Copilot]

Pull request overview

Fixes the documented record name for cache directory sync write sizing to match the actual registered configuration record in ATS.

Changes:

• Correct proxy.config.cache.dir.sync_max_writes → proxy.config.cache.dir.sync_max_write in the records.yaml documentation.

[JosiahWI]

[approve ci autest 2]

[bneradt]

My previous PR was just approved that fixes this, I believe:
#13177

Since that is now merged, I suppose we can close this.

[masaori335]

@bneradt Oh, you already fixed it. Thank you!