fix: update banner on snap appearing all the time

[Alphrag]

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Description of Change

Fix the update banner always showing up on the snap version, regardless of wether there was actually a new version.

Motivation and Context

In #2079 some changes were introduced to prevent snap users from trying to update the app by downloading the .deb file. However, a test was added to show the update banner when the user has a snap version, but was missing to check whether the app actually has an update available, which meant this banner was always showing. This PR makes sure this only happen when it should.

Fix #2112.

Screenshots

Checklist

• My pull request is properly named
• The changes respect the code style of the project (pnpm prepare-code)
• pnpm test passes
• I tested/previewed my changes locally

Release Notes