Update 00300-rust.md

[cloutiertyler]

Description of Changes

Minor docs typo fix suggested here: https://discord.com/channels/1037340874172014652/1452259224976625737/1452259224976625737

API and ABI breaking changes

None

Expected complexity level and risk

1

[jdetter]

Looks correct 👍

[cloutiertyler]

/update-llm-benchmark

[clockwork-labs-bot]

LLM Benchmark Results (ci-quickfix)

Language	Mode	Category	Tests Passed	Pass %	Task Pass %
Rust	rustdoc_json	basics	19/27	70.4%	66.7%
Rust	rustdoc_json	schema	23/34	67.6%	60.0%
Rust	rustdoc_json	total	42/61	68.9%	63.6%
C#	docs	basics	27/27	100.0%	100.0%
C#	docs	schema	28/34	82.4%	80.0%
C#	docs	total	55/61	90.2%	90.9%

_{Generated at: 2026-01-09T18:56:02.644Z}