Update Python version requirements in contributing guide (#1283)

pydis_site/apps/content/resources/guides/pydis-guides/contributing/bot.md

@@ -15,7 +15,7 @@ This page will focus on the quickest steps one can take, with mentions of altern
 ### Setup Project Dependencies
 Below are the dependencies you **must** have installed to get started with the bot.
 
-1. Make sure you have [Python 3.11](https://www.python.org/downloads/) installed. It helps if it is your system's default Python version.
+1. Make sure you have [Python 3.12](https://www.python.org/downloads/) installed. It helps if it is your system's default Python version.
 1. [Install Poetry](https://github.com/python-poetry/poetry#installation).
 1. [Install the project's dependencies](../installing-project-dependencies).
 1. Docker.

pydis_site/apps/content/resources/guides/pydis-guides/contributing/sir-lancebot.md

@@ -10,7 +10,7 @@ You should have already forked the [`sir-lancebot`](https://github.com/python-di
 Remember to ensure that you have read the [contributing guidelines](../contributing-guidelines) in full before you start contributing.
 
 ### Requirements
-- [Python 3.10.*](https://www.python.org/downloads/)
+- [Python 3.12.*](https://www.python.org/downloads/)
 - [Poetry](https://github.com/python-poetry/poetry#installation)
 - [Git](https://git-scm.com/downloads)
     - [Windows Installer](https://git-scm.com/download/win)