fixup! fixup! fixup! fixup! fixup! fixup! fixup! fixup! fixup! Build SDL3 for ReadTheDocs workflow

Author: HexDecimal

setup.py

@@ -58,7 +58,7 @@ def check_sdl_version() -> None:
             raise RuntimeError(msg) from exc
     except subprocess.CalledProcessError as exc:
         if sys.version_info >= (3, 11):
-            exc.add_note(f"{os.environ['PKG_CONFIG_PATH']=}")
+            exc.add_note(f"Note: {os.environ.get('PKG_CONFIG_PATH')=}")
         raise
     print(f"Found SDL {sdl_version_str}.")
     sdl_version = tuple(int(s) for s in sdl_version_str.split("."))