Bump puma from 5.6.8 to 6.4.3 in /src/supermarket

Bumps [puma](https://github.com/puma/puma) from 5.6.8 to 6.4.3.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v5.6.8...v6.4.3)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

src/supermarket/Gemfile.lock

@@ -547,7 +547,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (5.0.1)
-    puma (5.6.8)
+    puma (6.4.3)
       nio4r (~> 2.0)
     pundit (2.3.0)
       activesupport (>= 3.0.0)