Fix CODEOWNERS file paths (#243357)

## Summary

Fix CODEOWNERS file paths

Author: maryam-saeidi

.github/CODEOWNERS

@@ -3046,9 +3046,9 @@ docs/reference                                @elastic/experience-docs
 x-pack/platform/plugins/shared/actions/server/saved_objects/index.ts @elastic/response-ops @elastic/kibana-security
 x-pack/platform/plugins/shared/alerting/server/saved_objects/index.ts @elastic/response-ops @elastic/kibana-security
 x-pack/platform/plugins/shared/fleet/server/saved_objects/index.ts @elastic/fleet @elastic/kibana-security
-x-pack/plugins/observability_solution/synthetics/server/saved_objects/saved_objects.ts @elastic/obs-ux-management-team @elastic/kibana-security
-x-pack/plugins/observability_solution/synthetics/server/saved_objects/synthetics_monitor.ts @elastic/obs-ux-management-team @elastic/kibana-security
-x-pack/plugins/observability_solution/synthetics/server/saved_objects/synthetics_param.ts @elastic/obs-ux-management-team @elastic/kibana-security
+x-pack/solutions/observability/plugins/synthetics/server/saved_objects/saved_objects.ts @elastic/obs-ux-management-team @elastic/kibana-security
+x-pack/solutions/observability/plugins/synthetics/server/saved_objects/synthetics_monitor/legacy_synthetics_monitor.ts @elastic/obs-ux-management-team @elastic/kibana-security
+x-pack/solutions/observability/plugins/synthetics/server/saved_objects/synthetics_param.ts @elastic/obs-ux-management-team @elastic/kibana-security
 
 # OpenTelemetry semantic conventions Buildkite pipeline and scripts
 /.buildkite/pipeline-resource-definitions/kibana-otel-semconv-sync.yml @elastic/obs-onboarding-team