Update ruby Docker tag to v3.3.6 (#442)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ruby](https://www.ruby-lang.org)
([source](https://redirect.github.com/ruby/ruby)) | patch | `3.3.5` ->
`3.3.6` |

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.tool-versions

@@ -1,3 +1,3 @@
-ruby 3.3.5
+ruby 3.3.6
 nodejs 22.11.0
 yarn 1.22.19

docker-compose.yml

@@ -4,7 +4,7 @@ volumes:
   scim_stub_db:
 services:
   dummy-web:
-    image: ruby:3.3.5
+    image: ruby:3.3.6
     platform: linux/x86_64
     working_dir: /app/audiences/spec/dummy
     environment: