Bump mini_portile2 from 2.8.7 to 2.8.8

Bumps [mini_portile2](https://github.com/flavorjones/mini_portile) 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
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -236,7 +236,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     logger (1.6.0)
     mercenary (0.3.6)
-    mini_portile2 (2.8.7)
+    mini_portile2 (2.8.8)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)