Bump k8s.io/apimachinery in /extension/observer/k8sobserver

Bumps [k8s.io/apimachinery](https://github.com/kubernetes/apimachinery) from 0.27.3 to 0.27.4.
- [Commits](kubernetes/apimachinery@v0.27.3...v0.27.4)

---
updated-dependencies:
- dependency-name: k8s.io/apimachinery
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

extension/observer/k8sobserver/go.mod

@@ -11,7 +11,7 @@ require (
 	go.opentelemetry.io/collector/extension v0.81.0
 	go.uber.org/zap v1.24.0
 	k8s.io/api v0.27.3
-	k8s.io/apimachinery v0.27.3
+	k8s.io/apimachinery v0.27.4
 	k8s.io/client-go v0.27.3
 )