fix(deps): update module github.com/slack-go/slack to v0.15.0

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/go-git/go-git/v5 v5.11.0
 	github.com/json-iterator/go v1.1.12
 	github.com/magefile/mage v1.15.0
-	github.com/slack-go/slack v0.11.3
+	github.com/slack-go/slack v0.15.0
 	github.com/spf13/cobra v1.6.1
 	github.com/spf13/viper v1.18.2
 	github.com/stretchr/testify v1.9.0

go.sum

@@ -164,8 +164,8 @@ github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMB
 github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/skeema/knownhosts v1.2.1 h1:SHWdIUa82uGZz+F+47k8SY4QhhI291cXCpopT1lK2AQ=
 github.com/skeema/knownhosts v1.2.1/go.mod h1:xYbVRSPxqBZFrdmDyMmsOs+uX1UZC3nTN3ThzgDxUwo=
-github.com/slack-go/slack v0.11.3 h1:GN7revxEMax4amCc3El9a+9SGnjmBvSUobs0QnO6ZO8=
-github.com/slack-go/slack v0.11.3/go.mod h1:hlGi5oXA+Gt+yWTPP0plCdRKmjsDxecdHxYQdlMQKOw=
+github.com/slack-go/slack v0.15.0 h1:LE2lj2y9vqqiOf+qIIy0GvEoxgF1N5yLGZffmEZykt0=
+github.com/slack-go/slack v0.15.0/go.mod h1:hlGi5oXA+Gt+yWTPP0plCdRKmjsDxecdHxYQdlMQKOw=
 github.com/smartystreets/assertions v1.0.0/go.mod h1:kHHU4qYBaI3q23Pp3VPrmWhuIUrLW/7eUrw0BU5VaoM=
 github.com/smartystreets/go-aws-auth v0.0.0-20180515143844-0c1422d1fdb9/go.mod h1:SnhjPscd9TpLiy1LpzGSKh3bXCfxxXuqd9xmQJy3slM=
 github.com/smartystreets/gunit v1.0.0/go.mod h1:qwPWnhz6pn0NnRBP++URONOVyNkPyr4SauJk4cUOwJs=