[ignore] Update Changelog and annotation_unsupported.go for new relea…

…se (v2.16.0)

CHANGELOG.md

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+# Terraform Provider ACI - Changelog
+
+All notable changes to this project will be documented in this file.
+
+## 2.16.0 (August 09, 2024)
+
+IMPROVEMENTS:
+- Migration of aci_endpoint_security_group into plugin framework
+- Add datasource and resource for fvfbroute in aci_vrf_fallback_route and aci_vrf_fallback_route_group
+- Introduction of a provider level flag to prevent creation of objects that are already existing in apic configuration
+- Display id during plan for plugin framework resources where the dn can be constructed
+- Added useg attribute resource and data-source files
+- Migration of aci_application_epg into plugin framework
+- Add default parent dn for data plane policing policy resource
+- Add read-only pctag attribute to aci_endpoint_security_group resource and datasource
+- [minor] removed legacy route_control_profile resource files and recreated the new route_control_profile resource using the generator
+
+BUG FIXES:
+- Modified functionality of dorestrequest in utils.go to catch the appropriate errors returned by apic
+
 ## 2.15.0 (July 2, 2024)
 DEPRECATIONS:
 - Deprecate the non-functional `relation_vz_rs_graph_att` attribute from `aci_contract`. Use `relation_vz_rs_subj_graph_att` on `aci_contract_subject` instead.