Help: Reference correct variables in 3.6 release notes

Help/release/3.6.rst

@@ -225,8 +225,8 @@ CPack
   package file names, how to specify that rpmbuild should decide on file
   name format as well as handling of multiple rpm packages generated by a
   single user defined spec file.
-  See :variable:`CPACK_RPM_PACKAGE_NAME` and
-  :variable:`CPACK_RPM_<component>_PACKAGE_NAME`.
+  See :variable:`CPACK_RPM_FILE_NAME` and
+  :variable:`CPACK_RPM_<component>_FILE_NAME`.
 
 * The :cpack_gen:`CPack RPM Generator` learned how to correctly handle symlinks
   that are pointing outside generated packages.