Update module github.com/theckman/go-flock to v0.8.1

This MR contains the following updates:

Package	Type	Update	Change
github.com/theckman/go-flock	require	patch	v0.8.0 -> v0.8.1

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Release Notes

theckman/go-flock

v0.8.1

Compare Source

This change includes one bugfix for AIX:

• Fix issue caused by calling F_SETLKW instead of F_SETLK (#​52 [@​jwatson-cgu])

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This MR has been generated by Renovate Bot.

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/pierrec/lz4 v2.0.5+incompatible // indirect
 	github.com/prometheus/client_golang v1.11.0
 	github.com/russross/blackfriday/v2 v2.1.0
-	github.com/theckman/go-flock v0.8.0
+	github.com/theckman/go-flock v0.8.1
 	github.com/tstranex/u2f v1.0.0
 	go.opencensus.io v0.23.0
 	golang.org/x/crypto v0.0.0-20210506145944-38f3c27a63bf