zlib: update metadata for 1.2.13 update

Fixes: #18962

Documentation/release/dev/zlib-1.2.13.md

+## zlib-1.2.13
+
+The vendored `zlib` library has been updated to 1.2.13 to resolve
+CVE-2022-37434.

ThirdParty/zlib/CMakeLists.txt

 vtk_module_third_party(
   INTERNAL
-    LICENSE_FILES "vtkzlib/zlib.h"
-    VERSION       "1.2.12"
+    LICENSE_FILES "vtkzlib/LICENSE"
+    VERSION       "1.2.13"
     STANDARD_INCLUDE_DIRS
   EXTERNAL
     PACKAGE ZLIB