PR 143: Fix order of content-types on p:insert

XProc specifications published by continuous integration on 15 Jun 2026 for PR 143.

Specifications marked with ⏵ are likely to have been changed by this commit.

• XProc 3.2: An XML Pipeline Language
• XProc 3.2: Standard Step Library
• XProc 3.2: Invisible XML
• XProc 3.2: dynamic pipeline execution
• XProc 3.2: file steps
• XProc 3.2: mail steps
• XProc 3.2: operating system steps
• XProc 3.2: paged media steps
• XProc 3.2: text steps
• XProc 3.2: validation steps