Fixed newsletter name

Author: bmribler

downloads/hdf4/hdf4_3_1.md

@@ -11,7 +11,7 @@ title: HDF 4.3.1
 | Version | HDF 4.3.1 |
 | Release Date | 6/30/2025 |
 | Additional Release Information | [Release Notes](https://github.com/HDFGroup/hdf4/tree/hdf4.3.1/release_notes/RELEASE.txt) | 
-|| [Newsletter Announcement](https://www.hdfgroup.org/2025/06/release-of-hdf-4-3-1-newsletter-nnn/) | 
+|| [Newsletter Announcement](https://www.hdfgroup.org/2025/06/release-of-hdf-4-3-1-newsletter-206/) | 
 || [Compatibility Report for 4.3.1 vs 4.3.0](https://github.com/HDFGroup/hdf4/releases/download/hdf4.3.1/hdf4.3.1-vs-hdf4.3.0-interface_compatibility_report.html)
 || [Compatibility Report for 4.3.1 vs 4.3.0 - Java-interface](https://github.com/HDFGroup/hdf4/releases/download/hdf4.3.1/hdf4.3.1-vs-hdf4.3.0-java-interface_compatibility_report.html) |