README.md in ruby3-backward-compatibility-1.3.0 vs README.md in ruby3-backward-compatibility-1.4.0

@@ -134,10 +134,12 @@
 
 ### Object
 
 The methods `Object#taint` and `Object#untaint` were no-ops for a while but started to raise deprecation warnings.
 
-To add them back as no-ops, use
+The method `Object#=~` always returned `nil` if called on anything else than a String. It was removed in Ruby 3.2.
+
+To add back `Object#taint` and `Object#untaint` as no-ops and `Object#=~` on arbitrary receivers, use
 
 ```
 require 'ruby3_backward_compatibility/compatibility/object'
 ```