Bump kramdown from 2.5.1 to 2.5.2

Bumps [kramdown](https://github.com/gettalong/kramdown) from 2.5.1 to 2.5.2.
- [Release notes](https://github.com/gettalong/kramdown/releases)
- [Changelog](https://github.com/gettalong/kramdown/blob/master/doc/news.page)
- [Commits](https://github.com/gettalong/kramdown/commits)

---
updated-dependencies:
- dependency-name: kramdown
  dependency-version: 2.5.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -47,8 +47,8 @@ GEM
       sorted_set (~> 1.0)
     io-console (0.8.2)
     json_schema (0.21.0)
-    kramdown (2.5.1)
-      rexml (>= 3.3.9)
+    kramdown (2.5.2)
+      rexml (>= 3.4.4)
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -137,7 +137,7 @@ GEM
     rbtree (0.4.6)
     reline (0.6.3)
       io-console (~> 0.5)
-    rexml (3.4.2)
+    rexml (3.4.4)
     rouge (4.7.0)
     ruby-progressbar (1.13.0)
     sass-embedded (1.97.1-arm64-darwin)