fixup! X wcfs: v↑ go-fuse (checkpoint)

I forgot to update go.sum entry there and it started to fail to build.
Thanks to Rafael for the bug report.

wcfs/go.sum

@@ -184,6 +184,8 @@ honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 lab.nexedi.com/kirr/go-fuse/v2 v2.0.0-20210215102255-f0cbba3ef97e h1:6eJe/VaiivudiUEc2R324WN5djDycNvM1IkSQrC9idk=
 lab.nexedi.com/kirr/go-fuse/v2 v2.0.0-20210215102255-f0cbba3ef97e/go.mod h1:oRyA5eK+pvJyv5otpO/DgccS8y/RvYMaO00GgRLGryc=
+lab.nexedi.com/kirr/go-fuse/v2 v2.0.0-20210610115330-7e0334c3e76a h1:1Kagc2s/E5p2iqLLyGBtJRDssIa0uPbUKEEjKUZKSM4=
+lab.nexedi.com/kirr/go-fuse/v2 v2.0.0-20210610115330-7e0334c3e76a/go.mod h1:oRyA5eK+pvJyv5otpO/DgccS8y/RvYMaO00GgRLGryc=
 lab.nexedi.com/kirr/go123 v0.0.0-20210128150852-c20e95f0f789/go.mod h1:1wkWl3WhmutZiho+wsE7ymOKvRkN7hV3YZtL0f0gXTo=
 lab.nexedi.com/kirr/go123 v0.0.0-20210302025843-863c4602a230 h1:Ca6y0vXtxL2ncrg6rXL35FkXaqc2QWvctNSeZFGObZ8=
 lab.nexedi.com/kirr/go123 v0.0.0-20210302025843-863c4602a230/go.mod h1:pwDpdCuvtz0QxisDzV/z9eUb9zc/rMQec520h4i8VWQ=