Add changelog for 1.25.3

CHANGELOG.md

@@ -4,6 +4,33 @@ This changelog goes through the changes that have been made in each release
 without substantial changes to our git log; to see the highlights of what has
 been added to each release, please refer to the [blog](https://blog.gitea.com).
 
+## [1.25.3](https://github.com/go-gitea/gitea/releases/tag/1.25.3) - 2025-12-17
+
+* SECURITY
+  * Bump toolchain to go1.25.5, misc fixes (#36082)
+* ENHANCEMENTS
+  * Add strikethrough button to markdown editor (#36087) (#36104)
+  * Add "site admin" back to profile menu (#36010) (#36013)
+  * Improve math rendering (#36124) (#36125)
+* BUGFIXES
+  * Check user visibility when redirecting to a renamed user (#36148) (#36159)
+  * Fix various bugs (#36139) (#36151)
+  * Fix bug when viewing the commit diff page with non-ANSI files (#36149) (#36150)
+  * Hide RSS icon when viewing a file not under a branch (#36135) (#36141)
+  * Fix SVG size calulation, only use `style` attribute (#36133) (#36134)
+  * Make Golang correctly delete temp files during uploading (#36128) (#36129)
+  * Fix the bug when ssh clone with redirect user or repository (#36039) (#36090)
+  * Use Golang net/smtp instead of gomail's smtp to send email (#36055) (#36083)
+  * Fix edit user email bug in API (#36068) (#36081)
+  * Fix bug when updating user email (#36058) (#36066)
+  * Fix incorrect viewed files counter if file has changed (#36009) (#36047)
+  * Fix container registry error handling (#36021) (#36037)
+  * Fix webAuthn insecure error view (#36165) (#36179)
+  * Fix some file icon ui (#36078) (#36088)
+  * Fix Actions `pull_request.paths` being triggered incorrectly by rebase (#36045) (#36054)
+  * Fix error handling in mailer and wiki services (#36041) (#36053)
+  * Fix bugs when comparing and creating pull request (#36166) (#36144)
+
 ## [1.25.2](https://github.com/go-gitea/gitea/releases/tag/1.25.2) - 2025-11-23
 
 * SECURITY