updated changelog for v1.5.5

Author: kip-hart

CHANGELOG.rst

@@ -6,6 +6,12 @@ All notable changes to this project will be documented in this file.
 The format is based on `Keep a Changelog`_,
 and this project adheres to `Semantic Versioning`_.
 
+`1.5.5`_ - 2022-08-31
+--------------------------
+Changed
+'''''''
+- VTK writer for RasterMesh uses ``RECTILINEAR_GRID`` data type.
+
 `1.5.4`_ - 2022-04-16
 --------------------------
 Added
@@ -280,7 +286,8 @@ Added
 
 .. LINKS
 
-.. _`Unreleased`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.4...HEAD
+.. _`Unreleased`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.5...HEAD
+.. _`1.5.5`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.4...v1.5.5
 .. _`1.5.4`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.3...v1.5.4
 .. _`1.5.3`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.2...v1.5.3
 .. _`1.5.2`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.1...v1.5.2