fix(web): change version banner copy from "Upgrade" to "Update" (#1354)

* fix(web): change version banner copy from "Upgrade" to "Update"

Avoids confusion with upgrading plan tiers, since the banner is about
updating the Sourcebot version.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* docs: fix CHANGELOG PR link

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: msukkari

packages/web/src/app/(app)/components/banners/upgradeAvailableBanner.tsx

@@ -16,15 +16,15 @@ export function UpgradeAvailableBanner({ id, dismissible, currentVersion, latest
             dismissible={dismissible}
             icon={<CircleArrowUp className="h-4 w-4 mt-0.5" />}
             title="New Sourcebot version available"
-            description={`Upgrade from ${currentVersion} to ${latestVersion}.`}
+            description={`Update from ${currentVersion} to ${latestVersion}.`}
             action={
                 <Button asChild size="sm" variant="outline">
                     <Link
                         href="https://github.com/sourcebot-dev/sourcebot/releases/latest"
                         target="_blank"
                         rel="noreferrer"
                     >
-                        Upgrade
+                        Update
                         <ExternalLink className="h-3.5 w-3.5" />
                     </Link>
                 </Button>