Update specs for it parameter in proc for Ruby 4.0

The behaviour has changed in Ruby 4.0.
As a bonus: fix a typo: paramater => parameter

Author: herwinw

core/proc/parameters_spec.rb

@@ -159,10 +159,17 @@
     proc { |**nil| }.parameters.should == [[:nokey]]
   end
 
-  ruby_version_is "3.4" do
-    it "handles the usage of `it` as a paramater" do
+  ruby_version_is "3.4"..."4.0" do
+    it "handles the usage of `it` as a parameter" do
       eval("proc { it }").parameters.should == [[:opt, nil]]
       eval("lambda { it }").parameters.should == [[:req]]
     end
   end
+
+  ruby_version_is "4.0" do
+    it "handles the usage of `it` as a parameter" do
+      eval("proc { it }").parameters.should == [[:opt]]
+      eval("lambda { it }").parameters.should == [[:req]]
+    end
+  end
 end