Update changelog after release (#4160)

# Motivation

A release has been deployed to production.

# Changes

- Changelog - split out the changes included in the release.
- Increment the patch version of the nns-dapp.

CHANGELOG-Nns-Dapp-unreleased.md

@@ -14,12 +14,8 @@ proposal is successful, the changes it released will be moved from this file to
 
 #### Added
 
-* Redesign proposal detail neurons block (collapsible).
-* Display status in "voted neurons" headline.
-
 #### Changed
 
-* Default to main account on wallet page when `account` parameter is missing from the URL.
 * New light and dark theme colors.
 
 #### Deprecated
@@ -28,9 +24,6 @@ proposal is successful, the changes it released will be moved from this file to
 
 #### Fixed
 
-* Reverted the upgrade to SvelteKit 2 as it breaks iOS 15.
-* Auto updating wallet balances
-
 #### Security
 
 #### Not Published

CHANGELOG-Nns-Dapp.md

@@ -11,6 +11,26 @@ The NNS Dapp is released through proposals in the Network Nervous System. Theref
 Unreleased changes are added to `CHANGELOG-Nns-Dapp-unreleased.md` and moved
 here after a successful release.
 
+## Proposal 126904
+
+### Application
+
+#### Added
+
+* Redesign proposal detail neurons block (collapsible).
+* Display status in "voted neurons" headline.
+
+#### Changed
+
+* Default to main account on wallet page when `account` parameter is missing from the URL.
+
+#### Fixed
+
+* Reverted the upgrade to SvelteKit 2 as it breaks iOS 15.
+* Auto updating wallet balances
+
+### Operations
+
 ## Proposal 126861
 
 ### Application