Bump version to 2.5.2 (#8960)

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.5.2
+
+- Fix XSS vulnerability (#8959)
+
 ## 2.5.1
 
 - Fix some local images not having their EXIF metadata stripped on upload (#8714)

lib/mastodon/version.rb

@@ -13,7 +13,7 @@ module Mastodon
     end
 
     def patch
-      1
+      2
     end
 
     def pre