feat: ensure Ubuntu Noble is properly supported by the Dokku release process

Also update doc references to use 24.04 in examples where possible.

docs/deployment/builders/dockerfiles.md

@@ -130,7 +130,7 @@ dokku docker-options:add node-js-app build '--build-arg NODE_ENV'
 Once set, the Dockerfile usage would be as follows:
 
 ```Dockerfile
-FROM ubuntu:20.04
+FROM ubuntu:24.04
 
 # set the argument default
 ARG NODE_ENV=production
@@ -142,7 +142,7 @@ RUN echo $NODE_ENV
 You may also set the argument as an environment variable
 
 ```Dockerfile
-FROM ubuntu:20.04
+FROM ubuntu:24.04
 
 # set the argument default
 ARG NODE_ENV=production

docs/deployment/continuous-integration/github-actions.md

@@ -13,7 +13,7 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Cloning repo
         uses: actions/checkout@v3