changelog: add UNRELEASED entries from changelog-build output

changelog: fixup entries for 1.7.6 and 1.7.7

CHANGELOG.md

@@ -1,14 +1,25 @@
 ## UNRELEASED
 
+FEATURES:
+
+* agent: expose the list of supported envoy versions on /v1/agent/self [[GH-8545](https://github.com/hashicorp/consul/issues/8545)]
+
 BUG FIXES:
-* [backport/1.7.x] api: fixed a panic caused by an api request with Connect=null [[GH-8537](https://github.com/hashicorp/consul/pull/8537)]
+
+* connect: fix bug in preventing some namespaced config entry modifications [[GH-8601](https://github.com/hashicorp/consul/issues/8601)]
+* api: fixed a panic caused by an api request with Connect=null [[GH-8537](https://github.com/hashicorp/consul/pull/8537)]
 
 ## 1.7.7 (August 12, 2020)
 
 BUG FIXES:
-* [backport/1.7.x] catalog: fixed a bug where nodes, services, and checks would not be restored with the correct Create/ModifyIndex when restoring from a snapshot [[GH-8485](https://github.com/hashicorp/consul/pull/8485)]
-* [backport/1.7.x] vendor: update github.com/armon/go-metrics to v0.3.4 [[GH-8478](https://github.com/hashicorp/consul/pull/8478)]
-* [backport/1.7.x] xds: revert setting set_node_on_first_message_only to true when generating envoy bootstrap config [[GH-8441](https://github.com/hashicorp/consul/issues/8441)]
+* catalog: fixed a bug where nodes, services, and checks would not be restored with the correct Create/ModifyIndex when restoring from a snapshot [[GH-8485](https://github.com/hashicorp/consul/pull/8485)]
+* vendor: update github.com/armon/go-metrics to v0.3.4 [[GH-8478](https://github.com/hashicorp/consul/pull/8478)]
+
+## 1.7.6 (August 07, 2020)
+
+BUG FIXES:
+
+* xds: revert setting set_node_on_first_message_only to true when generating envoy bootstrap config [[GH-8441](https://github.com/hashicorp/consul/issues/8441)]
 
 ## 1.7.5 (July 30, 2020)