Fix total query tooltip on dahboard

[yubiuser]

What does this PR aim to accomplish?:

The total queries shown at the dashboard represent all queries not, not only 'A+AAAA' queries anymore. We use the /stats/summary endpoint which returns .queries.total. There is no indication that this is limited to A and AAAA queries.

How does this PR accomplish the above?:

Only change the description

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