Updated release notes to reference #1486

Author: WardF

RELEASE_NOTES.md

@@ -7,6 +7,7 @@ This file contains a high-level description of this package's evolution. Release
 
 ## 4.7.2 - TBD
 
+* [Bug Fix][Enhancement] Corrected an issue where protected memory was being written to with some pointer slight-of-hand.  This has been in the code for a while, but appears to be caught by the compiler on OSX, under circumstances yet to be completely nailed down.  See [GitHub #1486](https://github.com/Unidata/netcdf-c/issues/1486) for more information.  
 * [Enhancement] [Parallel IO] Added support for parallel functions in MSVC. See [Github #1492](https://github.com/Unidata/netcdf-c/pull/1492) for more information.
 * [Enhancement] Added a function for changing the ncid of an open file.  This function should only be used if you know what you are doing, and is meant to be used primarily with PIO integration. See [GitHub #1483](https://github.com/Unidata/netcdf-c/pull/1483) and [GitHub #1487](https://github.com/Unidata/netcdf-c/pull/1487) for more information.