build(deps): bump rexml from 3.2.6 to 3.2.7

Bumps [rexml](https://github.com/ruby/rexml) from 3.2.6 to 3.2.7.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.2.6...v3.2.7)

---
updated-dependencies:
- dependency-name: rexml
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -655,7 +655,8 @@ GEM
       railties (>= 5.2)
     reverse_markdown (2.1.1)
       nokogiri
-    rexml (3.2.6)
+    rexml (3.2.7)
+      strscan (>= 3.0.9)
     rouge (4.2.0)
     rsolr (2.2.1)
       builder (>= 2.1.2)
@@ -814,7 +815,7 @@ GEM
       railties (>= 6.0.0)
     strong_migrations (1.0.0)
       activerecord (>= 5.2)
-    strscan (3.0.6)
+    strscan (3.1.0)
     sunspot (2.5.0)
       pr_geohash (~> 1.0)
       rsolr (>= 1.1.1, < 3)