docs: remove 'Documentation Updates' section from content standards

Author: hannesrudolph

.roo/rules-release-notes-writer/2_content_standards.xml

@@ -166,7 +166,6 @@ Concluding sentence about the benefit.
       3. ## Bug Fixes
       4. ## Misc Improvements
       5. ## Provider Updates
-      6. ## Documentation Updates
     </order>
     <critical>QOL Improvements MUST always come before Bug Fixes</critical>
   </section_ordering>
@@ -444,4 +443,4 @@ See full release notes [vX.Y.Z](https://docs.roocode.com/update-notes/vX.Y.Z) |
     <rule>When the user asks for Discord notes, also produce Reddit notes in the same response.</rule>
     <rule>When the user asks for Reddit notes, also produce Discord notes in the same response.</rule>
   </cross_posting>
-</content_standards>
+</content_standards>