Bump jwt from 2.7.1 to 2.8.1 (#4076)

Bumps [jwt](https://github.com/jwt/ruby-jwt) from 2.7.1 to 2.8.1.
- [Release notes](https://github.com/jwt/ruby-jwt/releases)
- [Changelog](https://github.com/jwt/ruby-jwt/blob/main/CHANGELOG.md)
- [Commits](jwt/ruby-jwt@v2.7.1...v2.8.1)

---
updated-dependencies:
- dependency-name: jwt
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -391,7 +391,8 @@ GEM
     jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
     json (2.7.1)
-    jwt (2.7.1)
+    jwt (2.8.1)
+      base64
     kgio (2.11.4)
     kostya-sigar (2.0.10)
     kt-paperclip (7.2.2)