Update module github.com/urfave/cli/v2 to v2.23.6

Signed-off-by: Renovate Bot <bot@renovateapp.com>

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/go-logr/zapr v1.2.3
 	github.com/jmoiron/sqlx v1.3.5
 	github.com/stretchr/testify v1.8.0
-	github.com/urfave/cli/v2 v2.20.3
+	github.com/urfave/cli/v2 v2.23.6
 	github.com/vshn/cloudscale-metrics-collector v0.5.2
 	github.com/vshn/provider-exoscale v0.3.0
 	go.uber.org/zap v1.23.0

go.sum

@@ -450,8 +450,8 @@ github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVM
 github.com/ugorji/go v1.2.6/go.mod h1:anCg0y61KIhDlPZmnH+so+RQbysYVyDko0IMgJv0Nn0=
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
 github.com/ugorji/go/codec v1.2.6/go.mod h1:V6TCNZ4PHqoHGFZuSG1W8nrCzzdgA2DozYxWFFpvxTw=
-github.com/urfave/cli/v2 v2.20.3 h1:lOgGidH/N5loaigd9HjFsOIhXSTrzl7tBpHswZ428w4=
-github.com/urfave/cli/v2 v2.20.3/go.mod h1:1CNUng3PtjQMtRzJO4FMXBQvkGtuYRxxiR9xMa7jMwI=
+github.com/urfave/cli/v2 v2.23.6 h1:iWmtKD+prGo1nKUtLO0Wg4z9esfBM4rAV4QRLQiEmJ4=
+github.com/urfave/cli/v2 v2.23.6/go.mod h1:GHupkWPMM0M/sj1a2b4wUrWBPzazNrIjouW6fmdJLxc=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasttemplate v1.2.1/go.mod h1:KHLXt3tVN2HBp8eijSv/kGJopbvo7S+qRAEEKiv+SiQ=
 github.com/vshn/cloudscale-metrics-collector v0.5.2 h1:pGuEnpW/7tZNsk2Vyo+716/OMlgapPTytJGP8/GfjKs=