NEWS update for point release

Author: daviesrob

NEWS

@@ -1,5 +1,16 @@
 ## Release a.b
 
+Changes affecting the whole of bcftools, or multiple commands:
+
+* This release bundles HTSlib 1.22.2, which includes many important
+  bug fixes.  Please see htslib/NEWS for details.
+
+* Fix silent output truncation due to missing checks for read errors in
+  the annotate, cnv, concat, convert, consensus, csq, filter, gtcheck,
+  isec, merge, norm, query and stats commands; and all plugins.  They
+  will now print an error and return a non-zero exit code if an error
+  is encountered when reading input data. (#2503)
+
 Changes affecting specific commands:
 
 * bcftools consensus