build(deps): Bump mini_portile2 in the nokogiri group (#2421)

Bumps the nokogiri group with 1 update: [mini_portile2](https://github.com/flavorjones/mini_portile).


Updates `mini_portile2` from 2.8.7 to 2.8.8
- [Release notes](https://github.com/flavorjones/mini_portile/releases)
- [Changelog](https://github.com/flavorjones/mini_portile/blob/main/CHANGELOG.md)
- [Commits](flavorjones/mini_portile@v2.8.7...v2.8.8)

---
updated-dependencies:
- dependency-name: mini_portile2
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: nokogiri
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -138,7 +138,7 @@ GEM
     method_source (1.1.0)
     mini_magick (4.13.2)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.7)
+    mini_portile2 (2.8.8)
     minitest (5.25.1)
     msgpack (1.7.3)
     net-imap (0.4.17)