fix: add null pypi overrides for conda and pyodide

The download sweep queried PyPI by display name, but PyPI conda is a stale 2017 upload and PyPI pyodide is a 0.0.2 placeholder, so the site showed unrelated packages' download counts for both entries.

Co-Authored-By: Claude <noreply@anthropic.com>

website/data/pypi_name_overrides.json

@@ -3,6 +3,7 @@
   "azure-sdk-for-python": { "package": null, "reason": "monorepo umbrella; ships as many azure-* packages, no single package represents it", "badge": "Multiple on PyPI" },
   "cloud-init": { "package": null, "reason": "installed via distro images, not pip" },
   "concurrent-futures": { "package": null, "reason": "stdlib module" },
+  "conda": { "package": null, "reason": "installed via Miniforge or Anaconda installers; PyPI conda is a stale 2017 upload" },
   "cpython": { "package": null, "reason": "not pip-installable; the cpython PyPI name was squatted" },
   "devpi": { "package": "devpi-server", "reason": "devpi is a deprecated metapackage; the server package carries real usage" },
   "difflib": { "package": null, "reason": "stdlib module" },
@@ -23,6 +24,7 @@
   "pangu-py": { "package": "pangu", "reason": null },
   "playwright-python": { "package": "playwright", "reason": null },
   "pyenv": { "package": null, "reason": "installed via git/homebrew; PyPI pyenv is a defunct shim" },
+  "pyodide": { "package": null, "reason": "runs in the browser from a CDN or npm; PyPI pyodide is a 0.0.2 placeholder from 2021" },
   "pypy": { "package": null, "reason": "interpreter distributed via pypy.org, not pip" },
   "python-patterns": { "package": null, "reason": "reference repo, not a package; PyPI name held by unrelated 2012 project" },
   "pytorch": { "package": "torch", "reason": "PyPI pytorch is a squatter; real package is torch" },