fixup! fixup! fixup! Build SDL3 for ReadTheDocs workflow

Author: HexDecimal

.readthedocs.yaml

@@ -8,6 +8,12 @@ build:
   os: ubuntu-24.04
   tools:
     python: "3.11"
+  apt_packages:
+    - build-essential
+    - make
+    - pkg-config
+    - cmake
+    - ninja-build
   jobs:
     pre_install:
       - git clone --depth 1 --branch release-3.2.16 https://github.com/libsdl-org/SDL.git sdl_repo