Merge pull request #1614 from coderdojo-japan/dependabot/bundler/rexml-3.3.2

Bump rexml from 3.2.8 to 3.3.2

Author: yasulab

Gemfile.lock

@@ -371,8 +371,8 @@ GEM
     retriable (3.1.2)
     reverse_markdown (2.1.1)
       nokogiri
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.2)
+      strscan
     rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
     rspec-expectations (3.12.3)