docs: Update minimum Python and VapourSynth versions

.readthedocs.yaml

@@ -1,8 +1,8 @@
 version: 2
 
 build:
-  os: ubuntu-20.04
-  tools: {python: "3.8"}
+  os: ubuntu-22.04
+  tools: {python: "3.11"}
   jobs:
     post_checkout:
       - git fetch --unshallow

README.md

@@ -3,7 +3,7 @@
 [![Build status](https://github.com/rlaphoenix/VSGAN/actions/workflows/ci.yml/badge.svg)](https://github.com/rlaphoenix/VSGAN/actions/workflows/ci.yml)
 [![Docs Status](https://readthedocs.org/projects/vsgan/badge/?version=latest)](https://vsgan.phoeniix.dev/en/latest)
 [![Python versions](https://img.shields.io/pypi/pyversions/VSGAN)](https://python.org)
-[![VapourSynth versions](https://img.shields.io/badge/vapoursynth-R49%2B-informational)](https://vapoursynth.com)
+[![VapourSynth versions](https://img.shields.io/badge/vapoursynth-R55%2B-informational)](https://vapoursynth.com)
 [![DeepSource](https://deepsource.io/gh/rlaphoenix/VSGAN.svg/?label=active+issues&token=VWrr63j6jeWmT-QkIDpS0R9W)](https://deepsource.io/gh/rlaphoenix/VSGAN/?ref=repository-badge)
 <a href="https://colab.research.google.com/github/rlaphoenix/VSGAN/blob/master/VSGAN.ipynb">
     <img align="right" src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open in Colab"/>

docs/installation.rst

@@ -27,8 +27,8 @@ may need to install an older version to continue.
 .. _VapourSynth: https://vapoursynth.com/doc/installation.html
 .. _PyTorch: https://pytorch.org/get-started/locally
 
-1. Python_ 3.8 or newer. Must be a version supported by both VapourSynth_ and PyTorch_.
-2. VapourSynth_ r49 or newer.
+1. Python_ 3.9 or newer. Must be a version supported by both VapourSynth_ and PyTorch_.
+2. VapourSynth_ r55 or newer.
 
    - ⚠️ The Pip/PyPI package `VapourSynth` is *not* what you want to install.
 3. PyTorch_ 1.12.0 or newer.