Put Highlights on the top of RN

This should really be a separate high-level section as it contains a
subset of the full changelog (i.e. the items are repeated in the
respective categories below).

wiki/Releases/4.20.0.md

@@ -9,8 +9,7 @@ title: rpm.org - Releases
 * Source: TBD
 * SHA256SUM: TBD
 
-## Summary of changes
-### Highlights
+## Highlights
 * Command line: Implement `--json` query format ([#2913](https://github.com/rpm-software-management/rpm/pull/2913))
 * Transaction: Pass arg1 to file trigger scripts ([#2871](https://github.com/rpm-software-management/rpm/pull/2871))
 * Transaction: Pass arg2 to file trigger scripts ([#2883](https://github.com/rpm-software-management/rpm/pull/2883))
@@ -23,6 +22,7 @@ title: rpm.org - Releases
 * Plugins: Add a new plugin to enable Linux-specific namespace functionality ([#2666](https://github.com/rpm-software-management/rpm/pull/2666))
 * Plugins: Make the plugin API public ([#2661](https://github.com/rpm-software-management/rpm/pull/2661))
 
+## Changelog
 ### Enhancements
 * Command line: Add `--list` and `--delete` commands to rpmkeys ([#2921](https://github.com/rpm-software-management/rpm/pull/2921))
 * Command line: Implement `--json` query format ([#2913](https://github.com/rpm-software-management/rpm/pull/2913))

wiki/Releases/skeleton.md

@@ -9,7 +9,10 @@ title: rpm.org - Releases
 * Source: [rpm-X.Y.Z.tar.bz2](https://ftp.osuosl.org/pub/rpm/releases/rpm-X.Y.x/rpm-X.Y.Z.tar.bz2)
 * SHA256SUM: [insert here]
 
-## Summary of changes
+## Highlights
+[insert here]
+
+## Changelog
 [insert here]
 
 [Full Changelog](https://github.com/rpm-software-management/rpm/compare/rpm-X.Y.Z-1-release...rpm-X.Y.Z-release)