Add "sync" to the USB installation guide

Pulling out the USB drive after dd completes leads to corrupted/incomplete installation media if one forgets to flush the cached writes with "sync". Explicitly mentioning the command will possibly avoid some future annoyances/confusion.
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Hikmat Jafarli 2018-01-02 19:42:16 +04:00 committed by GitHub
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@ -65,7 +65,7 @@ an installation medium.)
If you prefer to use a USB drive, then you just need to copy the ISO onto the
USB device, e.g. using `dd`:
dd if=Qubes-R3-x86_64.iso of=/dev/sdX bs=1M
dd if=Qubes-R3-x86_64.iso of=/dev/sdX bs=1M && sync
Change `Qubes-R3-x86_64.iso` to the filename of the version you're installing,
and change `/dev/sdX` to the correct target device (e.g., `/dev/sda`).