2.15.2 bump

`synced_files` has been substituted by [files_to_sync](https://packit.dev/docs/configuration#files_to_sync).

libmodulemd.spec

@@ -24,7 +24,7 @@
 
 Name:           %{upstream_name}%{?v2_suffix}
 Version:        2.15.2
-Release:        5%{?dist}
+Release:        1%{?dist}
 Summary:        Module metadata manipulation library
 
 # COPYING:      MIT
@@ -41,8 +41,6 @@ Source0:        %{url}/releases/download/%{version}/modulemd-%{version}.tar.xz
 Source1:        %{url}/releases/download/%{version}/modulemd-%{version}.tar.xz.asc
 # Key exported from Petr Pisar's keyring
 Source2:        gpgkey-E3F42FCE156830A80358E6E94FD1AEC3365AF7BF.gpg
-# Adapt tests to glib2-2.87.0, in upstream after 2.15.2, bug #2423153
-Patch0:         modulemd-2.15.2-tests-Adapt-to-glib-2.87.0.patch
 
 BuildRequires:  gnupg2
 BuildRequires:  meson >= 0.47
@@ -191,33 +189,12 @@ mv %{buildroot}%{_mandir}/man1/modulemd-validator.1 \
 
 
 %changelog
-* Wed Jan 14 2026 Petr Pisar <ppisar@redhat.com> - 2.15.2-5
-- Adapt tests to glib2-2.87.0 (bug #2423153)
-
-* Fri Sep 19 2025 Python Maint <python-maint@redhat.com> - 2.15.2-4
-- Rebuilt for Python 3.14.0rc3 bytecode
-
-* Fri Aug 15 2025 Python Maint <python-maint@redhat.com> - 2.15.2-3
-- Rebuilt for Python 3.14.0rc2 bytecode
-
-* Thu Jul 24 2025 Fedora Release Engineering <releng@fedoraproject.org> - 2.15.2-2
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
-
 * Wed Jun 18 2025 Petr Pisar <ppisar@redhat.com> - 2.15.2-1
 - 2.15.2 bump
 
-* Tue Jun 03 2025 Python Maint <python-maint@redhat.com> - 2.15.1-2
-- Rebuilt for Python 3.14
-
 * Fri May 09 2025 Petr Pisar <ppisar@redhat.com> - 2.15.1-1
 - 2.15.1 bump
 
-* Mon Jan 20 2025 Fedora Release Engineering <releng@fedoraproject.org> - 2.15.0-16
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
-
-* Fri Jan 17 2025 Fedora Release Engineering <releng@fedoraproject.org> - 2.15.0-15
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
-
 * Thu Jul 18 2024 Fedora Release Engineering <releng@fedoraproject.org> - 2.15.0-14
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild