Fire show event when BrowserWindow shown via maximize()

Editor assessment

Clean and effective. The type matches the change — a missing event is a bug — and 'fire show event when BrowserWindow shown via maximize()' is imperative, lowercase, and names the exact trigger, which makes the entry self-explanatory in generated release notes. Length is well within limits. Two improvements would elevate it: a scope such as (window) would let changelog tooling group it, and a short body explaining why the event never fired (presumably maximize() bypassed the show path) would preserve the diagnosis for future readers. Without a body, that context lives only in the linked PR. As written, though, it fully satisfies the spec and reads well.