[ci-fix] Add docs for two common LintDiff errors in TypeSpec specs

[mikeharder]

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️️✔️BreakingChange succeeded [Detail] [Expand]

There are no breaking changes.

️️✔️Breaking Change(Cross-Version) succeeded [Detail] [Expand]

There are no breaking changes.

️️✔️CredScan succeeded [Detail] [Expand]

There is no credential detected.

️️✔️LintDiff succeeded [Detail] [Expand]

Validation passes for LintDiff.

️️✔️Avocado succeeded [Detail] [Expand]

Validation passes for Avocado.

️️✔️SwaggerAPIView succeeded [Detail] [Expand]

️️✔️TypeSpecAPIView succeeded [Detail] [Expand]

️️✔️ModelValidation succeeded [Detail] [Expand]

Validation passes for ModelValidation.

️️✔️SemanticValidation succeeded [Detail] [Expand]

Validation passes for SemanticValidation.

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Validation passed for PoliCheck.

️️✔️SpellCheck succeeded [Detail] [Expand]

Validation passes for SpellCheck.

️️✔️Lint(RPaaS) succeeded [Detail] [Expand]

Validation passes for Lint(RPaaS).

️️✔️PR Summary succeeded [Detail] [Expand]

Validation passes for Summary.

️⌛Automated merging requirements met pending [Detail]

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