Help: Add notes for topic 'UseSWIG-guess_module_name'

Help/release/dev/UseSWIG-guess_module_name.rst

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+UseSWIG-guess_module_name
+-------------------------
+
+* The :module:`UseSWIG` module learned to detect the module name
+  from ``.i`` source files if possible to avoid the need to set
+  the ``SWIG_MODULE_NAME`` source file property explicitly.