Add Python Pizza Warsaw among community partners (#1521)

Author: clytaemnestra

src/content/sponsors/pythonpizza/index.md

@@ -0,0 +1,19 @@
+---
+name: Python Pizza Warsaw
+url: https://warsaw.python.pizza/
+location: "Poland"
+industry: "Technology & Community"
+description:
+  "Python Pizza is a micro-conference bringing together the Python community in
+  Warsaw. Organized entirely by volunteers, Python Pizza events unite the love
+  of pizza and Python across Europe and beyond."
+socials:
+  linkedin: "https://www.linkedin.com/company/98334563"
+  twitter: "https://twitter.com/pythonpizza"
+  github: "https://github.com/pythonpizza"
+  discord:
+  mastodon:
+  bluesky:
+logo_padding: 10px
+tier: Partners
+---