Update conference website link to 2026

Author: MasonEgger

docs/sponsorship/conference.md

@@ -6,4 +6,4 @@ description: Looking to sponsor the largest Python programmer gathering in Texas
 Every year the PyTexas Foundation puts on the PyTexas Conference. Our sponsorship
 packages range from $1,000 - $9,000 with various perks focused on the event. 
 
-For more information visit the [Conference Website](https://www.pytexas.org/2025/sponsors/sponsor-us/).
+For more information visit the [Conference Website](https://www.pytexas.org/2026/sponsors/sponsor-us/).