Bump csv from 3.2.5 to 3.2.6

Bumps [csv](https://github.com/ruby/csv) from 3.2.5 to 3.2.6.
- [Release notes](https://github.com/ruby/csv/releases)
- [Changelog](https://github.com/ruby/csv/blob/master/NEWS.md)
- [Commits](ruby/csv@v3.2.5...v3.2.6)

---
updated-dependencies:
- dependency-name: csv
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -1296,7 +1296,7 @@ GEM
     concurrent-ruby (1.2.0)
     connection_pool (2.3.0)
     crass (1.0.6)
-    csv (3.2.5)
+    csv (3.2.6)
     d3-rails (5.9.2)
       railties (>= 3.1)
     database_cleaner (2.0.1)