Update README generation script

Author: tkralphs

.coin-or/generate_readme

@@ -190,6 +190,9 @@ echo "## CHANGELOG
           - \`oddwext\`: strategy used to search for wheel centers for the cuts found by CglOddWheel - 0=off, 1=one variable, 2=clique - default=2.
       - CglClique was replaced by CglBKClique as the default clique separator in CbcSolver.cpp.
 
+ * Release 2.10.9
+   * Maintenance release to push out accumulates patches.
+
  * Release 2.10.8
    * Re-generate binaries due to mistake in Github Actions configuration and 
      incorporate new release of Cgl.