docs: fix broken links

docs/en/getting-started/local_quickstart.md

@@ -18,7 +18,7 @@ This guide assumes you have already done the following:
    [venv][install-venv]).
 1. Installed [PostgreSQL 16+ and the `psql` client][install-postgres].
 
-[install-python]: https://wiki.python.org/moin/BeginnersGuide/Download
+[install-python]: https://www.python.org/downloads/
 [install-pip]: https://pip.pypa.io/en/stable/installation/
 [install-venv]:
     https://packaging.python.org/en/latest/tutorials/installing-packages/#creating-virtual-environments

docs/en/samples/bigquery/local_quickstart.md

@@ -76,7 +76,7 @@ This guide assumes you have already done the following:
 {{% /tab %}}
 {{< /tabpane >}}
 
-[install-python]: https://wiki.python.org/moin/BeginnersGuide/Download
+[install-python]: https://www.python.org/downloads/
 [install-pip]: https://pip.pypa.io/en/stable/installation/
 [install-venv]:
     https://packaging.python.org/en/latest/tutorials/installing-packages/#creating-virtual-environments