vendor: update golang.org/x/net/webdav - fixes #3002

This fixes duplicacy working with rclone serve webdav

vendor/golang.org/x/sys/windows/mkerrors.bash

@@ -7,7 +7,6 @@
 set -e
 shopt -s nullglob
 
-[[ $# -eq 1 ]] || { echo "Usage: $0 OUTPUT_FILE.go" >&2; exit 1; }
 winerror="$(printf '%s\n' "/mnt/c/Program Files (x86)/Windows Kits/"/*/Include/*/shared/winerror.h | sort -Vr | head -n 1)"
 [[ -n $winerror ]] || { echo "Unable to find winerror.h" >&2; exit 1; }
 
@@ -61,4 +60,4 @@ declare -A errors
 	done < "$winerror"
 
 	echo ")"
-} | gofmt > "$1"
+} | gofmt > "zerrors_windows.go"