Add OWASP LASCON 2025 (#1386)

* Add OWASP LASCON 2025

* Update README.md

---------

Co-authored-by: Aurelie Vache <[email protected]>

Author: enzowritescode

README.md

@@ -556,6 +556,7 @@ All the data (past and coming) are available publicly in JSON:
 * 22-23: [PyTorch Conference 2025](https://events.linuxfoundation.org/pytorch-conference-2025/) - San Francisco, CA (USA)
 * 22-24: [TestCon Europe](https://testcon.lt/) -  Vilnius (Lithuania) <a href="https://airtable.com/appLMKzG4KLtRRZKA/shruR2a0n1n9y3PfA"><img alt="CFP TestCon Europe 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2001-October-2025&color=green"></a>
 * 22-24: [Ekoparty Security Conference 2025](https://www.ekoparty.org) - Buenos Aires (Argentina) <a href="https://sessionize.com/ekoparty-security-conference-2025/"><img alt="CFP Ekoparty Security Conference 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2022-August-2025&color=green"></a>
+* 23-24: [OWASP LASCON 2025](https://lascon.org/) - Austin, TX (USA) <a href="https://sessionize.com/owasp-lascon-2025-cfpresentations/"><img alt="OWASP LASCON 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2001-May-2025&color=green"></a>
 * 24: [DevFest Croatia 2025](https://gdg.community.dev/events/details/google-gdg-zagreb-presents-devfest-2025/) - Zagreb (Croatia) <a href="https://docs.google.com/forms/d/e/1FAIpQLScrrAm6aIN9C2WPPI3Ir1xQmtXz67SOE-qhE97YarNaPFiq9w/viewform"><img alt="CFP DevFest Croatia 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2024-August-2025&color=green"></a>
 * 24: [GoWest Conf 2025](https://www.gowestconf.com/) - Lehi, UT (USA) <a href="https://sessionize.com/gowest-conf-2025"><img alt="CFP GoWest Conf 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2003-April-2025&color=green"></a>
 * 26-31: [2025 Power Platform Community Conference](https://powerplatformconf.com) - Las Vegas, NV (USA) <a href="https://sessionize.com/2025-power-platform-community-conference/"><img alt="CFP 2025 Power Platform Community Conference" src="https://img.shields.io/static/v1?label=CFP&message=until%2024-March-2025&color=green"></a>