fix: latest version warnings can be less eager

[pauldambra]

If we release a number of fixes in a short amount of time then the version warning can warn you to upgrade after only one or two days... see https://posthog.com/questions/how-to-turn-off-the-your-post-hog-sdk-needs-updating-message

Since we're eager on reporting folk who are using deprecated versions, we can be a little less eager for minor version bumps

(also avoids returning a warning if there is no version string to resolve #24479)

[github-actions]

Size Change: +747 B (+0.07%)

Total Size: 1.08 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	1.08 MB	+747 B (+0.07%)

_{compressed-size-action}

[posthog-bot]

📸 UI snapshots have been updated

1 snapshot changes in total. 0 added, 1 modified, 0 deleted:

• chromium: 0 added, 1 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

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[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.