Add PCD @ Amsterdam to the PCD map

[github-actions]

Note

The Plus Code was auto-recovered from the user's input (9WM3+M5) using the city as a reference. Please verify the map pin placement is correct (https://plus.codes/9F469WM3+M5).

Closes #34

This PR was generated from the "New Event" issue form for PCD @ Amsterdam.
Submitted by @dxviie.

Review checklist:

• Event name "PCD @ Amsterdam" is correct
• Public name "David Vandenbogaerde" and email "david+pcd@d17e.dev" are correct
• Short description is left blank — confirm this is intentional
• Long description is left blank — confirm this is intentional
• Date is marked TBD — confirm this is intentional
• Location is marked TBD — confirm this is intentional
• Check the map and event details page in the Netlify preview (link posted below by the Netlify bot)

[netlify]

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[dxviie]

Confirming that descriptions, location & date are left blank/marked TBD intentionally