docs: reverse what's new order in TOC (grafana#67596)

* reverse order of what's new pages

* fix page weight numbering to follow original pattern

Author: imatwawana

docs/sources/whatsnew/whats-new-in-v9-3.md

@@ -9,7 +9,7 @@ keywords:
   - '9.3'
   - release notes
 title: What's new in Grafana v9.3
-weight: -33
+weight: -34
 ---
 
 # What’s new in Grafana v9.3

docs/sources/whatsnew/whats-new-in-v9-4.md

@@ -7,7 +7,7 @@ keywords:
   - '9.4'
   - release notes
 title: What's new in Grafana v9.4
-weight: -33
+weight: -35
 ---
 
 # What’s new in Grafana v9.4

docs/sources/whatsnew/whats-new-in-v9-5.md

@@ -7,7 +7,7 @@ keywords:
   - '9.5'
   - release notes
 title: What's new in Grafana v9.5
-weight: -33
+weight: -36
 ---
 
 # What’s new in Grafana v9.5