Updated NLog v5 release-post with pull-request-groups (fixed links) (#249)

Author: snakefoot

_posts/2021-08-25-nlog-5-0-preview1-ready.md

@@ -698,4 +698,10 @@ In NLog 4 this results in `'a'` and in NLog 5 this results in `a`.
 
 ## Many other improvements
 
-For a full list of all the enhancements and performance improvements: [NLog 5.0 PullRequests](https://github.com/NLog/NLog/pulls?q=is%3Apr+is%3Amerged+milestone:%225.0%20%28new%29%22)
+For full list of all changes: [NLog 5.0 Pull Requests](https://github.com/NLog/NLog/pulls?q=is%3Apr+is%3Amerged+milestone:%225.0%22)
+
+- [Breaking Changes](https://github.com/NLog/NLog/pulls?q=is%3Apr+label%3A%22breaking%20change%22+is%3Amerged+milestone:%225.0%22)
+- [Breaking Behavior Changes](https://github.com/NLog/NLog/pulls?q=is%3Apr+label%3A%22breaking%20behavior%20change%22+is%3Amerged+milestone:%225.0%22)
+- [Features](https://github.com/NLog/NLog/pulls?q=is%3Apr+label%3A%22Feature%22+is%3Amerged+milestone:%225.0%22)
+- [Improvements](https://github.com/NLog/NLog/pulls?q=is%3Apr+label%3A%22Enhancement%22+is%3Amerged+milestone:%225.0%22)
+- [Performance](https://github.com/NLog/NLog/pulls?q=is%3Apr+label%3A%22Performance%22+is%3Amerged+milestone:%225.0%22)