Merge pull request #3313 from ruby/dependabot/bundler/gemfiles/2.7/test-unit-3.6.5

Bump test-unit from 3.6.4 to 3.6.5 in /gemfiles/2.7

Author: kddnewton

gemfiles/2.7/Gemfile.lock

@@ -18,7 +18,7 @@ GEM
     rake-compiler (1.2.8)
       rake
     rbs (3.1.3)
-    test-unit (3.6.4)
+    test-unit (3.6.5)
       power_assert
 
 PLATFORMS