Add PCD @ The Hague to the PCD map

[github-actions]

Note

The Plus Code was auto-recovered from the user's input (38F6+RQ The Hague) using the city as a reference. Please verify the map pin placement is correct (https://plus.codes/9F4638F6+RQ).

Closes #38

This PR was generated from the "New Event" issue form for PCD @ The Hague.
Submitted by @edwinRNDR.

Review checklist:

• Event name "PCD @ The Hague" is correct
• Public name "Edwin Jakobs" and email "edwin@openrndr.org" are correct
• Date is marked TBD — confirm this is intentional
• Venue address and map pin placement are correct
• Check the map and event details page in the Netlify preview (link posted below by the Netlify bot)

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[SableRaf]

@edwinRNDR Did you mean to put the pin there? https://plus.codes/9F4638F6+RQ

It doesn't seem to match the address Copernicuslaan 19

[edwinRNDR]

It is the right pin location but the wrong address. It should be Paviljoensgracht 20

[SableRaf]

It is the right pin location but the wrong address. It should be Paviljoensgracht 20

@edwinRNDR: I see! Could you edit the issue to include the correct "Street address of the event venue" then? It will run the validation again and update this PR.