Bump version to 2.2.5

Author: onevcat

APNGKit.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "APNGKit"
-  s.version      = "2.2.4"
+  s.version      = "2.2.5"
   s.summary      = "High performance and delightful way to play with APNG format in iOS."
 
   s.description  = <<-DESC

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [2.2.5] - 2023-12-11
+
 ### Fix
 
 - A wrong condition check that caused the fix in 2.2.4 not to work as expected. [#141](https://github.com/onevcat/APNGKit/pull/141)
@@ -90,3 +92,4 @@ need also check the README to do a re-implement.
 [2.2.2]: https://github.com/onevcat/APNGKit/compare/2.2.1...2.2.2
 [2.2.3]: https://github.com/onevcat/APNGKit/compare/2.2.2...2.2.3
 [2.2.4]: https://github.com/onevcat/APNGKit/compare/2.2.3...2.2.4
+[2.2.5]: https://github.com/onevcat/APNGKit/compare/2.2.4...2.2.5