Checked for Updates event not firing due to malformed http header

[brian-mann]

The "Checked for Updates" event is not firing in version 7.0.0 and users will not see the update banner when we release 7.0.1.

[cypress-bot]

The code for this is done in cypress-io/cypress#15830, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 7.0.1.

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