Add SWIG-4.1.1 RELEASENOTES summary

Author: wsfulton

RELEASENOTES

@@ -7,6 +7,11 @@ Release Notes
 Detailed release notes are available with the release and are also
 published on the SWIG web site at https://swig.org/release.html.
 
+SWIG-4.1.1 summary:
+- Couple of stability fixes.
+- Some template handling improvements.
+- R - minor fixes plus deprecation for rtypecheck typemaps being optional.
+
 SWIG-4.1.0 summary:
 - Add Javascript Node v12-v18 support, remove support prior to v6.
 - Octave 6.0 to 6.4 support added.