docs: add a note about Python availability on ARM64

compnerd · compnerd · commit bef1c89ea7f9 · 2024-06-25T08:56:09.000-07:00
Visual Studio does not provide a ARM64 python distribution yet, so
indicate that we need a separate installation there.
diff --git a/docs/WindowsQuickStart.md b/docs/WindowsQuickStart.md
@@ -35,6 +35,9 @@ vs_community.exe ^
 del /q vs_community.exe
 ```
 
+> [!IMPORTANT]
+> On ARM64, Visual Studio doesn't include Python. If you are building Swift on an ARM64 processor, install Python from https://www.python.org/downloads/ and don't include the `Component.CPython39.x64` line in the command above.
+
 ### Enable Symbolic Links Support
 
 > [!NOTE]
