About page tabs don't have hover effect

[caugner]

STR:

1. Go to https://developer.mozilla.org/en-US/about
2. Hover over the tabs (What we offer, Our journey, etc.)

Expected: Hover effect.

Actual: No effect on hover.

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Screenshot:

[brysonbw]

What hover effect is expected?

[caugner]

What hover effect is expected?

Like in HTTP Observatory: https://developer.mozilla.org/en-US/observatory/analyze?host=mdn.dev#scoring

[brysonbw]

What hover effect is expected?

Like in HTTP Observatory: https://developer.mozilla.org/en-US/observatory/analyze?host=mdn.dev#scoring

Ok, smooth. Thanks

[caugner]

Regressor: #346