Update test dependencies for Ruby 3 support

This updates
- listen
- simplecov-html

which are both transitive dependencies to enable
Ruby 3 support in our builds.

Gemfile.lock

@@ -717,7 +717,7 @@ GEM
       reverse_markdown (~> 1.0)
       rugged (>= 0.24, < 2.0)
       thor (>= 0.19, < 2.0)
-    listen (3.2.1)
+    listen (3.6.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     locale (2.1.3)
@@ -1198,7 +1198,7 @@ GEM
       simplecov-html (~> 0.11)
     simplecov-cobertura (1.3.1)
       simplecov (~> 0.8)
-    simplecov-html (0.12.2)
+    simplecov-html (0.12.3)
     sixarm_ruby_unaccent (1.2.0)
     slack-messenger (2.3.4)
     snowplow-tracker (0.6.1)