amend changelog

Author: TomHodson

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 * Add a new LongConstantString codec which permits encoding constant columns where the constant is a string > 8 characters in length.
     * This saves 1 byte per row compared the previous way these columns were encoded.
-    * A python implementation has been added to pyodc at the same time.
+    * A python implementation has been added to pyodc at the same time, version 1.5.0
     * Decoding data using this codec will work straight away.
     * Encoding data with the new codec is disabled by default and can be enabled with the environment variable "ODC_ENABLE_WRITING_LONG_STRING_CODEC=1".
     * At some point in a future release, encoding will be enabled by default.