Add PyCon Portugal as community partner (#1621)

cc @dariagrudzien for keeping track the community partners 🤗

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: hypha <ramble.dalloway@gmail.com>

Author: 3 people

src/content/sponsors/pycon-portugal/index.md

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+---
+name: PyCon Portugal
+url: https://2026.pycon.pt/
+location: "Portugal"
+industry: "Technology & Community"
+description:
+  "PyCon Portugal is Portugal’s annual conference dedicated to the Python
+  programming language and its community. Since its first edition in 2022, PyCon
+  Portugal has brought together developers, researchers, students, educators,
+  startups, and technology companies from Portugal and around the world to share
+  knowledge, foster collaboration, and celebrate open-source innovation. Hosted
+  in a different Portuguese city each year — Porto (2022), Coimbra (2023), Braga
+  (2024), Cascais (2025), and Aveiro (2026) — the conference has become one of
+  the country’s leading community-driven technology events, connecting academia,
+  industry, and the global Python ecosystem."
+socials:
+  linkedin: "https://www.linkedin.com/company/84778227"
+  twitter: "https://x.com/PyConPT"
+  youtube: "https://www.youtube.com/@pyconportugal"
+logo_padding: 10px
+tier: Partners
+---