Draft changelog: XAA post_id qualifier for like.create

[mintlify]

Summary

Adds a Sep 15, 2026 changelog entry for the new post_id filter qualifier on like.create events in the X Activity API.

Changes

• New <Update> block under Sep 15, 2026 (X API v2) linking to X Activity API and its filter qualifiers section.

Context

Source PR: #412 (adds post_id row to the qualifiers table and a JSON example subscription).

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Project	Status	Preview	Updated
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