Update changelog.

debian/changelog

@@ -1,3 +1,15 @@
+cmake (3.13.0~rc2-2) UNRELEASED; urgency=medium
+
+  [ Jelmer Vernooij ]
+  * Use secure copyright file specification URI.
+  * Trim trailing whitespace.
+
+  [ Lisandro Damián Nicanor Pérez Meyer ]
+  * Add Helmut Grohne's script to generate toolchain files based on
+    Ubuntu/Debian's Multi-Arch as debtoolchainfilegen.
+
+ -- Felix Geyer <fgeyer@debian.org>  Thu, 29 Nov 2018 20:25:46 +0100
+
 cmake (3.13.0~rc2-1) experimental; urgency=medium
 
   * New upstream release candidate.
@@ -9,18 +21,6 @@ cmake (3.13.0~rc2-1) experimental; urgency=medium
 
  -- Felix Geyer <fgeyer@debian.org>  Sun, 28 Oct 2018 14:29:04 +0100
 
-cmake (3.12.3-4) UNRELEASED; urgency=medium
-
-  [ Jelmer Vernooij ]
-  * Use secure copyright file specification URI.
-  * Trim trailing whitespace.
-
-  [ Lisandro Damián Nicanor Pérez Meyer ]
-  * Add Helmut Grohne's script to generate toolchain files based on
-    Ubuntu/Debian's Multi-Arch as debtoolchainfilegen.
-
- -- Jelmer Vernooij <jelmer@debian.org>  Sun, 28 Oct 2018 11:29:48 +0000
-
 cmake (3.12.3-3) unstable; urgency=medium
 
   * Fix info and man page install directories on kFreeBSD. (Closes: #911700)