Create updateRelease.yml

[laeubi]

Add workflow for automatic release updates

FYI @akurtakov @iloveeclipse here is a screen cast how it works to apply and test the shared action to a repository, I'll try to do some more tomorrow, but if in the meanwhile someone likes to help with that it would be appriciated!

How this can be tested / applied to other repositories

• go to your fork of the repository - all the following steps are performed in the forked repository

• go to the settings and make sure actions are enabled (don't forget to save!)
  

• and issues as well
  

• make sure it is in sync on the master branch, if not, sync your fork
  

• navigate to .github/workflows and choose create new file
  

• name the file updateRelease.yml and paste the following snippet:

name: Update to next release
on:
  milestone:
    types: [created]

jobs:
  update:
    if: contains(github.event.milestone.description, 'Release')
    permissions:
      pull-requests: write
      contents: write
    uses: eclipse-platform/eclipse.platform.releng.aggregator/.github/workflows/updateRelease.yml@master

• now commit it directly to your master branch
  
• then go to the issues and select milestones
  
• create a new milestone and name it 4.28 and in the Description enter the word Release
  
• now head over to the Actions tab and you should see y job "Update to next release running"
  
• just wait a while and you should get a new PR created in your repo, review if it looks sane
  
• now go to the code tab and select "contribute" to open a PR to merge it in the final repo
  

[laeubi]

Example PR:

• https://github.com/laeubi/eclipse.platform.ui/pull/3/files