Add the EuroPython 2026 entry (#288)

* Add the EuroPython 2026 entry

* Add sponsor link for EuroPython 2026

Added sponsor link for EuroPython 2026.

Author: webknjaz

2026.csv

@@ -7,6 +7,7 @@ PyCon DE & PyData,2026-04-13,2026-04-17,"Darmstadt, Germany",DEU,datmstadtium,,,
 PyTexas,2026-04-17,2026-04-19,"Austin, Texas United States",USA,Austin Central Library,,2025-12-07,https://www.pytexas.org/2026/,https://pretalx.com/pytexas-2026/,https://www.pytexas.org/2026/sponsors/sponsor-us/
 PyCon US,2026-05-13,2026-05-19,"Long Beach, California, United States of America",USA,Long Beach Convention and Entertainment Center,,2025-12-19,https://us.pycon.org/2026/,https://us.pycon.org/2026/speaking/guidelines/,https://us.pycon.org/2026/sponsorship/why-sponsor/
 PyCon Italia,2026-05-27,2026-05-30,"Bologna, Italy",ITA,Savoia Hotel Regency,,,https://2026.pycon.it,,https://2026.pycon.it/sponsor/
+EuroPython,2026-07-13,2026-07-19,"Kraków, Poland",POL,,,2026-02-15,https://ep2026.europython.eu,https://ep2026.europython.eu/cfp,https://ep2026.europython.eu/sponsors
 PyOhio,2026-07-25,2026-07-26,"Cleveland, Ohio, United States of America",USA,Cleveland State University Student Center,,,https://www.pyohio.org/2026/,,
 PyCon AU,2026-08-26,2026-08-30,"Brisbane, Australia",AUS,Sofitel Brisbane Central,,,https://2026.pycon.org.au,,
 PyCon PL,2026-08-27,2026-08-30,"Gliwice, Poland",POL,"Education and Congress Centre, Silesian University of Technology",2026-02-15,2026-02-15,https://pl.pycon.org/2026,https://pyconpl.confreg.pl/events/67-pycon-pl-2026,