ui: bump the rack group

Bumps the rack group in /server/src/main/webapp/WEB-INF/rails with 3 updates: [rack](https://github.com/rack/rack), [rack-session](https://github.com/rack/rack-session) and [rackup](https://github.com/rack/rackup).


Updates `rack` from 2.2.22 to 3.2.5
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.22...v3.2.5)

Updates `rack-session` from 1.0.2 to 2.1.1
- [Release notes](https://github.com/rack/rack-session/releases)
- [Changelog](https://github.com/rack/rack-session/blob/main/releases.md)
- [Commits](rack/rack-session@v1.0.2...v2.1.1)

Updates `rackup` from 1.0.1 to 2.3.1
- [Release notes](https://github.com/rack/rackup/releases)
- [Changelog](https://github.com/rack/rackup/blob/main/releases.md)
- [Commits](rack/rackup@v1.0.1...v2.3.1)

---
updated-dependencies:
- dependency-name: rack
  dependency-version: 3.2.5
  dependency-type: indirect
  update-type: version-update:semver-major
  dependency-group: rack
- dependency-name: rack-session
  dependency-version: 2.1.1
  dependency-type: indirect
  update-type: version-update:semver-major
  dependency-group: rack
- dependency-name: rackup
  dependency-version: 2.3.1
  dependency-type: indirect
  update-type: version-update:semver-major
  dependency-group: rack
...

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

Author: dependabot[bot]

server/src/main/webapp/WEB-INF/rails/Gemfile.lock

@@ -97,14 +97,14 @@ GEM
     public_suffix (6.0.2)
     racc (1.8.1)
     racc (1.8.1-java)
-    rack (2.2.22)
-    rack-session (1.0.2)
-      rack (< 3)
+    rack (3.2.5)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
     rack-test (2.2.0)
       rack (>= 1.3)
-    rackup (1.0.1)
-      rack (< 3)
-      webrick
+    rackup (2.3.1)
+      rack (>= 3)
     rails-controller-testing (1.0.5)
       actionpack (>= 5.0.1.rc1)
       actionview (>= 5.0.1.rc1)
@@ -171,7 +171,6 @@ GEM
     tzinfo-data (1.2026.1)
       tzinfo (>= 1.0.0)
     useragent (0.16.11)
-    webrick (1.9.2)
     xpath (3.2.0)
       nokogiri (~> 1.8)
     zeitwerk (2.6.18)
@@ -234,10 +233,10 @@ CHECKSUMS
   public_suffix (6.0.2) sha256=bfa7cd5108066f8c9602e0d6d4114999a5df5839a63149d3e8b0f9c1d3558394
   racc (1.8.1) sha256=4a7f6929691dbec8b5209a0b373bc2614882b55fc5d2e447a21aaa691303d62f
   racc (1.8.1-java) sha256=54f2e6d1e1b91c154013277d986f52a90e5ececbe91465d29172e49342732b98
-  rack (2.2.22) sha256=c5cf0b7f872559966d974abe3101a57d51caf12504ee76290b98720004f64542
-  rack-session (1.0.2) sha256=a02115e5420b4de036839b9811e3f7967d73446a554b42aa45106af335851d76
+  rack (3.2.5) sha256=4cbd0974c0b79f7a139b4812004a62e4c60b145cba76422e288ee670601ed6d3
+  rack-session (2.1.1) sha256=0b6dc07dea7e4b583f58a48e8b806d4c9f1c6c9214ebc202ec94562cbea2e4e9
   rack-test (2.2.0) sha256=005a36692c306ac0b4a9350355ee080fd09ddef1148a5f8b2ac636c720f5c463
-  rackup (1.0.1) sha256=ba86604a28989fe1043bff20d819b360944ca08156406812dca6742b24b3c249
+  rackup (2.3.1) sha256=6c79c26753778e90983761d677a48937ee3192b3ffef6bc963c0950f94688868
   rails-controller-testing (1.0.5) sha256=741448db59366073e86fc965ba403f881c636b79a2c39a48d0486f2607182e94
   rails-dom-testing (2.3.0) sha256=8acc7953a7b911ca44588bf08737bc16719f431a1cc3091a292bca7317925c1d
   rails-html-sanitizer (1.7.0) sha256=28b145cceaf9cc214a9874feaa183c3acba036c9592b19886e0e45efc62b1e89
@@ -262,7 +261,6 @@ CHECKSUMS
   tzinfo (2.0.6) sha256=8daf828cc77bcf7d63b0e3bdb6caa47e2272dcfaf4fbfe46f8c3a9df087a829b
   tzinfo-data (1.2026.1) sha256=4ea36519ae5ae2cf0fad471207a519be006daf42e3b2359ee9e9c53f113609fd
   useragent (0.16.11) sha256=700e6413ad4bb954bb63547fa098dddf7b0ebe75b40cc6f93b8d54255b173844
-  webrick (1.9.2) sha256=beb4a15fc474defed24a3bda4ffd88a490d517c9e4e6118c3edce59e45864131
   xpath (3.2.0) sha256=6dfda79d91bb3b949b947ecc5919f042ef2f399b904013eb3ef6d20dd3a4082e
   zeitwerk (2.6.18) sha256=bd2d213996ff7b3b364cd342a585fbee9797dbc1c0c6d868dc4150cc75739781