Update golang.org/x/crypto commit hash to b8e89b7

This MR contains the following updates:

Package	Type	Update	Change
golang.org/x/crypto	require	digest	eec23a3 -> b8e89b7

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go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/prometheus/client_golang v1.9.0
 	github.com/prometheus/procfs v0.3.0 // indirect
 	github.com/sethvargo/go-password v0.2.0
-	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
+	golang.org/x/crypto v0.0.0-20210218145215-b8e89b74b9df
 	golang.org/x/net v0.0.0-20210119194325-5f4716e94777
 	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
 	golang.org/x/sys v0.0.0-20210113181707-4bcb84eeeb78 // indirect