Add PyCon Greece as community partner (#1556)

Author: gmargaritis

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

@@ -0,0 +1,18 @@
+---
+name: PyCon Greece
+url: https://pycon.gr/
+location: "Greece"
+industry: "Technology & Community"
+description:
+  "PyCon Greece brings together developers, educators, and companies to exchange
+  ideas, work together, and strengthen the Python ecosystem. Its annual
+  conference promotes inclusivity, education, and open-source collaboration."
+socials:
+  linkedin: "https://www.linkedin.com/company/pycon-greece/"
+  github: "https://github.com/pygreece/"
+  discord: "https://discord.gg/F8G2YZ39ab"
+  instagram: "https://www.instagram.com/pycongreece"
+  youtube: "https://www.youtube.com/@pycongreece"
+logo_padding: 10px
+tier: Partners
+---