[AI-FSSDK] prepare for release swift-sdk v5.3.0 (#633)

* [FSSDK-12546] release swift v5.3.0

* Update CHANGELOG.md

* Update CHANGELOG.md

* Update README.md

* Update swift.yml

* Update SDKVersion.swift

---------

Co-authored-by: Muzahidul Islam <129880873+muzahidul-opti@users.noreply.github.com>

Author: jaeopt

.github/workflows/swift.yml

@@ -17,7 +17,7 @@ on:
         description: release
 
 env:
-  VERSION: 5.2.1
+  VERSION: 5.3.0
 
 jobs:
 

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Optimizely Swift SDK Changelog
 
+## 5.3.0
+May 4, 2026
+
+### New Features
+
+**Feature Rollout**: Added support for Feature Rollouts, a new experiment type 
+combining Targeted Delivery simplicity with A/B test measurement capabilities. 
+Feature Rollouts enable progressive rollouts with full impact analytics, metric tracking, 
+and confidence intervals. 
+See [Feature Rollout docs](https://support.optimizely.com/hc/en-us/articles/45552846481037-Run-Feature-Rollouts-in-Feature-Experimentation) for more information.
+
+- Add Feature Rollout support ([#626](https://github.com/optimizely/swift-sdk/pull/626))
+
 ## 5.2.1
 January 23rd, 2026
 

OptimizelySwiftSDK.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name                    = "OptimizelySwiftSDK"
   s.module_name	            = "Optimizely"
-  s.version                 = "5.2.1"
+  s.version                 = "5.3.0"
   s.summary                 = "Optimizely experiment framework for iOS/tvOS/watchOS"
   s.homepage                = "https://docs.developers.optimizely.com/experimentation/v4.0.0-full-stack/docs"
   s.license                 = { :type => "Apache License, Version 2.0", :file => "LICENSE" }

README.md

@@ -39,7 +39,7 @@ If you have a name conflict with other swift packages when you add the Optimizel
 #### CocoaPods 
 1. Add the following lines to the _Podfile_:<pre>
 ```use_frameworks!```
-```pod 'OptimizelySwiftSDK', '~> 5.2.1'```
+```pod 'OptimizelySwiftSDK', '~> 5.3.0'```
 </pre>
 
 2. Run the following command: <pre>``` pod install ```</pre>
@@ -129,4 +129,4 @@ Used to enforce Swift style and conventions.
 
 - React - https://github.com/optimizely/react-sdk
 
-- Ruby - https://github.com/optimizely/ruby-sdk  
+- Ruby - https://github.com/optimizely/ruby-sdk  

Sources/Utils/SDKVersion.swift

@@ -17,4 +17,4 @@
 /// Do not edit this field.
 /// - It is auto updated (Scripts/updated_version.sh) to reflect the current version
 /// - Do not put underscores in the name (Swiftlint can modify unexpectedly)
-let OPTIMIZELYSDKVERSION = "5.2.1"
+let OPTIMIZELYSDKVERSION = "5.3.0"