Updated Review guidelines (markdown)

Review-guidelines.md

@@ -51,7 +51,10 @@
     - _DDP is like the same analogy but instead of copying the car 8 times, we copy it 7 times and the main car then joins those 7 to train like all._
     - Make sure this works with 16-bit precision.
 
-### 5. Check if the change is mentioned in **CHANGELOG** (no need for typos, docs, and CI).
+### 5. Check if the change is mentioned in CHANGELOG
+- Any bugfix, feature, substantial change in code behaviour shall be included
+- No need for typos, docs, and CI edits
+- [this is testing suggestion] make 2 line spacing between all items in "active" section (unreleased changes), this shall prevent collisions in git, later before release we format the active section at once
 
 ## Approving PRs