Bump rack-session from 2.1.0 to 2.1.1 in /demo (#3481)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Josh Black <joshblack@github.com>

Author: dependabot[bot]

demo/Gemfile.lock

@@ -270,12 +270,12 @@ GEM
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.12)
+    rack (3.1.14)
     rack-cors (2.0.2)
       rack (>= 2.0.0)
     rack-proxy (0.7.7)
       rack
-    rack-session (2.1.0)
+    rack-session (2.1.1)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rack-test (2.2.0)