[Tagging] fixing the historic overview page

[osmmailinglists.ju6n8 at thibaultmol.link]

I guess it might be worth adding a line or two about openhistoricalmap.
Seems relevant here

On Wed, Apr 20, 2022, 11:06 Martin Koppenhoefer - dieterdreist at gmail.com
<tsmkqeutsrhfhjirqlelyvilaxpz at simplelogin.co> wrote:

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> and also key:historic
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