add code quotes around wsl --mount (#906)

Author: jzabroski

WSL/release-notes.md

@@ -13,7 +13,7 @@ ms.localizationpriority: high
 ## Build 20211
 For general Windows information on build 20211 visit the [Windows blog](https://blogs.windows.com/windows-insider/2020/09/10/announcing-windows-10-insider-preview-build-20211/).
 
-* Introduce wsl.exe --mount for mounting physical or virtual disks. For more information see [Access Linux filesystems in Windows and WSL 2](https://devblogs.microsoft.com/commandline/access-linux-filesystems-in-windows-and-wsl-2/).
+* Introduce `wsl.exe --mount` for mounting physical or virtual disks. For more information see [Access Linux filesystems in Windows and WSL 2](https://devblogs.microsoft.com/commandline/access-linux-filesystems-in-windows-and-wsl-2/).
 * Fix crash in LxssManager service when checking if the VM is idle. [GH 5768]
 * Support for compressed VHD files. [GH 4103]
 * Ensure that Linux user mode libs installed to c:\windows\system32\lxss\lib are preserved across OS upgrade. [GH 5848]