chore: update gitea to 28.2.0

Update version to 28.2.0 and append changelog entry.

Upstream release highlights from https://blog.gitea.com/release-of-28.2.0/:
- Security fixes for multiple CVEs (including SSH certificate principals
  lookup in #39839, OpenID state validation in #39642, issue attachment
  validation in #39839, and Actions artifact v4 size limits in #39818).
- Dependency updates including golang.org/x/net to v0.60.0.
- Bug fixes across OAuth2, Actions, PR diff tree, and webhooks.

Signed-off-by: Jason Rothstein <fdragon@fdragon.org>

gitea.spec

@@ -5,7 +5,7 @@ ExclusiveArch:  %{go_arches}
 %endif
 
 Name:           gitea
-Version:        28.1.0
+Version:        28.2.0
 Release:        1%{?dist}
 Summary:        Gitea: Git with a cup of tea
 
@@ -93,6 +93,9 @@ install -D -p -m 0644 %{SOURCE1} %{buildroot}%{_sysusersdir}/gitea.conf
 
 
 %changelog
+* Tue Oct 20 2026 Jason Rothstein
+- 28.2.0
+
 * Tue Oct 20 2026 Jason Rothstein
 - 28.1.0