Bump mnemosyne-ruby from 2.0.0 to 2.1.1

Bumps [mnemosyne-ruby](https://github.com/jgraichen/mnemosyne-ruby) from 2.0.0 to 2.1.1.
- [Release notes](https://github.com/jgraichen/mnemosyne-ruby/releases)
- [Changelog](https://github.com/mnemosyne-mon/mnemosyne-ruby/blob/main/CHANGELOG.md)
- [Commits](mnemosyne-mon/mnemosyne-ruby@v2.0.0...v2.1.1)

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

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

Gemfile.lock

@@ -254,7 +254,7 @@ GEM
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    logger (1.6.2)
+    logger (1.6.3)
     loofah (2.23.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
@@ -272,7 +272,7 @@ GEM
     mini_mime (1.1.5)
     mini_portile2 (2.8.8)
     minitest (5.25.4)
-    mnemosyne-ruby (2.0.0)
+    mnemosyne-ruby (2.1.1)
       activesupport (>= 6.1)
       bunny
     msgpack (1.7.5)