release notes; bump minor to 2.8

Author: mgravell

docs/ReleaseNotes.md

@@ -7,6 +7,11 @@ Current package versions:
 | [![StackExchange.Redis](https://img.shields.io/nuget/v/StackExchange.Redis.svg)](https://www.nuget.org/packages/StackExchange.Redis/) | [![StackExchange.Redis](https://img.shields.io/nuget/vpre/StackExchange.Redis.svg)](https://www.nuget.org/packages/StackExchange.Redis/) | [![StackExchange.Redis MyGet](https://img.shields.io/myget/stackoverflow/vpre/StackExchange.Redis.svg)](https://www.myget.org/feed/stackoverflow/package/nuget/StackExchange.Redis) |
 
 ## Unreleased
+
+
+## 2.8.0
+
+- Add high-integrity mode ([docs](https://stackexchange.github.io/StackExchange.Redis/Configuration), [#2471 by mgravell](https://github.com/StackExchange/StackExchange.Redis/pull/2741]))
 - TLS certificate/`TrustIssuer`: Check EKU in X509 chain checks when validating certificates ([#2670 by NickCraver](https://github.com/StackExchange/StackExchange.Redis/pull/2670))
 
 ## 2.7.33

version.json

@@ -1,5 +1,5 @@
 {
-  "version": "2.7",
+  "version": "2.8",
   "versionHeightOffset": -1,
   "assemblyVersion": "2.0",
   "publicReleaseRefSpec": [