chore: update changelog

Release 5.6.18.

debian/changelog

@@ -1,3 +1,20 @@
+dtkcore (5.6.18) unstable; urgency=medium
+
+  * fix: Can't clear cache when reset for DConfig in FileBackend
+  * feat: Add isDefaultValue for DConfig(Issue: #3)
+  * fix: Compiling failed in lower libspdlog-dev
+  * fix: missing parameter passing for synchronization
+  * fix(build): skip failed unit test
+  * chore(tools): show help if argc < 2
+  * fix: Compiling failed in libspdlog-dev before 1.4.0
+    Thanks to Shiroko
+  * fix: cmake failure when env is null
+  * chore: correct typos in DtkSettingsToolsMacros.cmake
+    Thanks to Felix Yan
+  * chore: dpinyin tweak(Issue: #109)
+
+ -- Deepin Packages Builder <packages@deepin.org>  Wed, 18 Oct 2023 06:01:45 +0000
+
 dtkcore (5.6.17) unstable; urgency=medium
 
   * Release 5.6.17