fix(deps): bump github.com/cloudevents/sdk-go/v2 in /api

Bumps [github.com/cloudevents/sdk-go/v2](https://github.com/cloudevents/sdk-go) from 2.15.2 to 2.16.0.
- [Release notes](https://github.com/cloudevents/sdk-go/releases)
- [Commits](cloudevents/sdk-go@v2.15.2...v2.16.0)

---
updated-dependencies:
- dependency-name: github.com/cloudevents/sdk-go/v2
  dependency-version: 2.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

api/go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/NdoleStudio/lemonsqueezy-go v1.2.4
 	github.com/avast/retry-go v3.0.0+incompatible
 	github.com/carlmjohnson/requests v0.24.3
-	github.com/cloudevents/sdk-go/v2 v2.15.2
+	github.com/cloudevents/sdk-go/v2 v2.16.0
 	github.com/cockroachdb/cockroach-go/v2 v2.4.0
 	github.com/davecgh/go-spew v1.1.1
 	github.com/dgraph-io/ristretto v1.0.0

api/go.sum

@@ -70,8 +70,8 @@ github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK3
 github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-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/cloudevents/sdk-go/v2 v2.16.0 h1:wnunjgiLQCfYlyo+E4+mFlZtAh7pKn7vT8MMD3lSwCg=
+github.com/cloudevents/sdk-go/v2 v2.16.0/go.mod h1:5YWqklyhDSmGzBK/JENKKXdulbPq0JFf3c/KEnMLqgg=
 github.com/cockroachdb/cockroach-go/v2 v2.4.0 h1:7K5vpE3m7LylIbmpbr4eEhApDTPMgFgR+eDPy1sdJjM=
 github.com/cockroachdb/cockroach-go/v2 v2.4.0/go.mod h1:9U179XbCx4qFWtNhc7BiWLPfuyMVQ7qdAhfrwLz1vH0=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=