rebase: bump github.com/onsi/gomega from 1.18.0 to 1.18.1

Bumps [github.com/onsi/gomega](https://github.com/onsi/gomega) from 1.18.0 to 1.18.1.
- [Release notes](https://github.com/onsi/gomega/releases)
- [Changelog](https://github.com/onsi/gomega/blob/master/CHANGELOG.md)
- [Commits](https://github.com/onsi/gomega/compare/v1.18.0...v1.18.1)

---
updated-dependencies:
- dependency-name: github.com/onsi/gomega
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

vendor/github.com/onsi/gomega/matchers/have_field.go

@@ -12,6 +12,13 @@ func extractField(actual interface{}, field string) (interface{}, error) {
 	fields := strings.SplitN(field, ".", 2)
 	actualValue := reflect.ValueOf(actual)
 
+	if actualValue.Kind() == reflect.Ptr {
+		actualValue = actualValue.Elem()
+	}
+	if actualValue == (reflect.Value{}) {
+		return nil, fmt.Errorf("HaveField encountered nil while dereferencing a pointer of type %T.", actual)
+	}
+
 	if actualValue.Kind() != reflect.Struct {
 		return nil, fmt.Errorf("HaveField encountered:\n%s\nWhich is not a struct.", format.Object(actual, 1))
 	}