build: explicitly pull torch from PyPI if not on Windows

pyproject.toml

@@ -32,12 +32,14 @@ simple-websocket = "^1.0.0"
 torch = [
     # Install the CUDA version on Windows. Projects that depend on us always get their dependencies from PyPI, so
     # there's no point moving this to the main dependencies section.
-    { version = "^2.3.0", markers="sys_platform == 'win32'", source = "torch_cuda121" },
+    { version = "^2.3.0", markers="sys_platform == 'win32'", source = "torch_cuda" },
+    { version = "^2.3.0", markers="sys_platform != 'win32'", source = "pypi" },
 ]
 torchvision = [
     # Install the CUDA version on Windows. Projects that depend on us always get their dependencies from PyPI, so
     # there's no point moving this to the main dependencies section.
-    { version = "^0.18.0", markers="sys_platform == 'win32'", source = "torch_cuda121" },
+    { version = "^0.18.0", markers="sys_platform == 'win32'", source = "torch_cuda" },
+    { version = "^0.18.0", markers="sys_platform != 'win32'", source = "pypi" },
 ]
 
 [tool.poetry.group.docs.dependencies]
@@ -46,7 +48,7 @@ mkdocs-glightbox = "^0.3.4"
 mkdocs-material = "^9.1.17"
 
 [[tool.poetry.source]]
-name = "torch_cuda121"
+name = "torch_cuda"
 url = "https://download.pytorch.org/whl/cu121"
 priority = "explicit"