Correct the value type for swapFile

Author: stuartleeks

WSL/wsl-config.md

@@ -345,7 +345,7 @@ These settings affect the VM that powers any WSL 2 distribution.
 | localhostForwarding | boolean | `true` | Boolean specifying if ports bound to wildcard or localhost in the WSL 2 VM should be connectable from the host via localhost:port. |
 | kernelCommandLine | string | Blank | Additional kernel command line arguments. |
 | swap | size | 25% of memory size on Windows rounded up to the nearest GB | How much swap space to add to the WSL 2 VM, 0 for no swap file. |
-| swapFile | size | %USERPROFILE%\AppData\Local\Temp\swap.vhdx | An absolute Windows path to the swap virtual hard disk. |
+| swapFile | string | %USERPROFILE%\AppData\Local\Temp\swap.vhdx | An absolute Windows path to the swap virtual hard disk. |
 
 Entries with the `path` value must be Windows paths with escaped backslashes, e.g: `C:\\Temp\\myCustomKernel`