Add 3.3.4 entry

Author: kou

NEWS.md

@@ -1,10 +1,17 @@
 # News
 
+## 3.3.4 - 2025-04-13
+
+### Improvements
+
+  * `csv-filter`: Removed an experimental command line tool.
+    * GH-341
+
 ## 3.3.3 - 2025-03-20
 
 ### Improvements
 
-  * `csv-filter`: Add an experimental command line tool to filter a CSV.
+  * `csv-filter`: Added an experimental command line tool to filter a CSV.
     * Patch by Burdette Lamar
 
 ### Fixes