fix(XML): fixed aggregateType docs for incomplete_first_party_*

[lime]

Fixes typos in 1.5 and 1.6 referring to third-party components, where first-party was intended.

Originally submitted as a fix for the guides in CycloneDX/guides#32.

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TODO / DONE:

• fix XML schema
• fix JSON schema - was correct, already
• fix PB schema - was correct, already

[jkowalleck]

need to triage if this is a bug, or intended behavior.

we usually dont "patch" older versions, while we are working on a newer one.
we are currently finalizing v1.7

if accepted, we need to forward-port this to 1.7

• https://github.com/CycloneDX/specification/blob/1.7-dev/schema/bom-1.7.proto
• https://github.com/CycloneDX/specification/blob/1.7-dev/schema/bom-1.7.schema.json
• https://github.com/CycloneDX/specification/blob/1.7-dev/schema/bom-1.7.xsd

[jkowalleck]

Triaged. This is a bug indeed.

[jkowalleck]

the spec had the correct wording already, which this patch applies to the XML implementation.
will merge this.

thanks for the fix, @lime