Update vulnerable packages in some examples

Author: loreto

examples/stacks/django/requirements.txt

@@ -1,4 +1,4 @@
 asgiref==3.6.0
-Django==4.2.22
+Django==4.2.24
 psycopg2==2.9.5
 sqlparse==0.5.0

examples/stacks/jekyll/devbox.lock

@@ -49,6 +49,10 @@
         }
       }
     },
+    "github:NixOS/nixpkgs/nixpkgs-unstable": {
+      "last_modified": "2025-09-21T09:21:16Z",
+      "resolved": "github:NixOS/nixpkgs/a1f79a1770d05af18111fbbe2a3ab2c42c0f6cd0?lastModified=1758446476&narHash=sha256-5rdAi7CTvM%2FkSs6fHe1bREIva5W3TbImsto%2BdxG4mBo%3D"
+    },
     "libffi@latest": {
       "last_modified": "2024-02-22T01:07:56Z",
       "resolved": "github:NixOS/nixpkgs/98b00b6947a9214381112bdb6f89c25498db4959#libffi",

examples/stacks/jekyll/myblog/Gemfile.lock

@@ -56,7 +56,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.3.9)
+    rexml (3.4.4)
     rouge (3.30.0)
     safe_yaml (1.0.5)
     sass (3.7.4)

examples/stacks/rails/blog/Gemfile.lock

@@ -200,7 +200,7 @@ GEM
     regexp_parser (2.9.2)
     reline (0.5.10)
       io-console (~> 0.5)
-    rexml (3.4.1)
+    rexml (3.4.4)
     rubyzip (2.3.2)
     securerandom (0.4.1)
     selenium-webdriver (4.25.0)