build(deps): update module github.com/cloudevents/sdk-go/v2 to v2.15.2 [security]

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

go.mod

@@ -3,7 +3,7 @@ module github.com/keptn-service-template-go
 go 1.17
 
 require (
-	github.com/cloudevents/sdk-go/v2 v2.10.0
+	github.com/cloudevents/sdk-go/v2 v2.15.2
 	github.com/kelseyhightower/envconfig v1.4.0 // indirect
 	github.com/keptn/go-utils v0.17.1-0.20220718120931-866624f8ce42
 	github.com/mitchellh/mapstructure v1.5.0

go.sum

@@ -67,6 +67,8 @@ github.com/cloudevents/sdk-go/observability/opentelemetry/v2 v2.0.0-202110012128
 github.com/cloudevents/sdk-go/v2 v2.5.0/go.mod h1:nlXhgFkf0uTopxmRXalyMwS2LG70cRGPrxzmjJgSG0U=
 github.com/cloudevents/sdk-go/v2 v2.10.0 h1:sz0pbNBGh1iRspqLGe/2cXhDghZZpvNPHwKPucVbh+8=
 github.com/cloudevents/sdk-go/v2 v2.10.0/go.mod h1:GpCBmUj7DIRiDhVvsK5d6WCbgTWs8DxAWTRtAwQmIXs=
+github.com/cloudevents/sdk-go/v2 v2.15.2 h1:54+I5xQEnI73RBhWHxbI1XJcqOFOVJN85vb41+8mHUc=
+github.com/cloudevents/sdk-go/v2 v2.15.2/go.mod h1:lL7kSWAE/V8VI4Wh0jbL2v/jvqsm6tjmaQBSvxcv4uE=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=