Bump sanitize from 5.2.3 to 6.0.0

Bumps [sanitize](https://github.com/rgrove/sanitize) from 5.2.3 to 6.0.0.
- [Release notes](https://github.com/rgrove/sanitize/releases)
- [Changelog](https://github.com/rgrove/sanitize/blob/main/HISTORY.md)
- [Commits](rgrove/sanitize@v5.2.3...v6.0.0)

---
updated-dependencies:
- dependency-name: sanitize
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -363,8 +363,6 @@ GEM
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
-    nokogumbo (2.0.4)
-      nokogiri (~> 1.8, >= 1.8.4)
     oauth (0.5.6)
     oauth2 (1.4.7)
       faraday (>= 0.8, < 2.0)
@@ -540,10 +538,9 @@ GEM
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
-    sanitize (5.2.3)
+    sanitize (6.0.0)
       crass (~> 1.0.2)
-      nokogiri (>= 1.8.0)
-      nokogumbo (~> 2.0)
+      nokogiri (>= 1.12.0)
     sassc (2.4.0)
       ffi (~> 1.9)
     sassc-rails (2.1.2)