build(deps): bump golang.org/x/sync from 0.3.0 to 0.4.0 #634

Job	Run time
Build melange and add to artifact cache	2m 15s
Build packages (hello-wolfi)	2m 7s
Build packages (glibc)	18m 21s
Build packages (tini)	1m 5s
Build packages (lzo)	1m 54s
Build packages (bubblewrap)	1m 43s
Build packages (gdk-pixbuf)	1m 59s
Build packages (gitsign)	3m 49s
Build packages (guac)	4m 40s
Build packages (mdbook)	5m 46s
Build packages (s3cmd)	1m 39s
Build packages (perl-yaml-syck)	1m 37s
Build packages (xmlto)	1m 26s
Build packages (ncurses)	3m 7s
	51m 28s

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