Update github.com/cespare/xxhash/v2 to v2.1.2

github.com/cespare/xxhash/v2 v2.1.1 is incompatible with Go 1.17 (see cespare/xxhash#54)
Here we bump up the dependency to solve the issue.

Signed-off-by: Federico Paolinelli <fpaoline@redhat.com>

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/Masterminds/sprig/v3 v3.2.2
 	github.com/blang/semver v3.5.1+incompatible
 	github.com/cenkalti/backoff v2.2.1+incompatible
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/coreos/go-systemd/v22 v22.0.0
 	github.com/fsnotify/fsnotify v1.4.9
 	github.com/go-logr/logr v0.4.0 // indirect

go.sum

@@ -133,6 +133,8 @@ github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
+github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/chai2010/gettext-go v0.0.0-20160711120539-c6fed771bfd5/go.mod h1:/iP1qXHoty45bqomnu2LM+VVyAEdWN+vtSHGlQgyxbw=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=