Bump puma from 5.6.4 to 5.6.8 (#1583)

Bumps [puma](https://github.com/puma/puma) from 5.6.4 to 5.6.8.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v5.6.4...v5.6.8)

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

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

Gemfile.lock

@@ -175,7 +175,7 @@ GEM
     multipart-post (2.2.0)
     netrc (0.11.0)
     newrelic_rpm (8.8.0)
-    nio4r (2.5.8)
+    nio4r (2.7.0)
     nokogiri (1.15.2)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
@@ -211,7 +211,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.7)
-    puma (5.6.4)
+    puma (5.6.8)
       nio4r (~> 2.0)
     pundit (2.2.0)
       activesupport (>= 3.0.0)