Create ChangeLog for v1.6.3

Author: VolkerEnderlein

docs/ChangeLog.v1.6.3

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+2025-06-26 22:51:37 +0200  Volker Enderlein  <volkerenderlein@hotmail.com> (4330172)
+
+	Update NEWS file.
+
+M	NEWS
+
+2025-06-26 22:51:31 +0200  Volker Enderlein  <volkerenderlein@hotmail.com> (86c3190)
+
+	Bump version number.
+
+M	CMakeLists.txt
+M	Makefile.am
+M	Makefile.in
+M	appveyor.yml
+M	configure
+M	configure.ac
+
+2025-04-01 20:18:03 +0200  Volker Enderlein  <volkerenderlein@hotmail.com> (7862e1c)
+
+	Adapt cmake_minimum_required command for usage with CMake 4.0
+
+M	CMakeLists.txt
+
+2025-03-26 22:59:00 +0100  Volker Enderlein  <volkerenderlein@hotmail.com> (3629394)
+
+	CI: update CodeQL action
+
+M	.github/workflows/codeql.yml
+
+2025-02-17 20:04:59 +0100  Volker Enderlein  <volkerenderlein@hotmail.com> (d2ca7e7)
+
+	Update Github upload-artifact action to v4 [skip ci]
+
+M	.github/workflows/continuous-integration-workflow.yml